Update vendor (slack)

46 files changed, 0 insertions, 5719 deletions

diff --git a/vendor/github.com/matterbridge/slack/LICENSE b/vendor/github.com/matterbridge/slack/LICENSE
deleted file mode 100644
index 5145171f..00000000
--- a/vendor/github.com/matterbridge/slack/LICENSE
+++ /dev/null
@@ -1,23 +0,0 @@
-Copyright (c) 2015, Norberto Lopes
-All rights reserved.
-
-Redistribution and use in source and binary forms, with or without modification,
-are permitted provided that the following conditions are met:
-
-1. Redistributions of source code must retain the above copyright notice, this
-list of conditions and the following disclaimer.
-
-2. Redistributions in binary form must reproduce the above copyright notice,
-this list of conditions and the following disclaimer in the documentation and/or
-other materials provided with the distribution.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
-ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/vendor/github.com/matterbridge/slack/admin.go b/vendor/github.com/matterbridge/slack/admin.go
deleted file mode 100644
index 478c4f40..00000000
--- a/vendor/github.com/matterbridge/slack/admin.go
+++ /dev/null
@@ -1,214 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"fmt"
-	"net/url"
-)
-
-type adminResponse struct {
-	OK    bool   `json:"ok"`
-	Error string `json:"error"`
-}
-
-func adminRequest(ctx context.Context, method string, teamName string, values url.Values, debug bool) (*adminResponse, error) {
-	adminResponse := &adminResponse{}
-	err := parseAdminResponse(ctx, method, teamName, values, adminResponse, debug)
-	if err != nil {
-		return nil, err
-	}
-
-	if !adminResponse.OK {
-		return nil, errors.New(adminResponse.Error)
-	}
-
-	return adminResponse, nil
-}
-
-// DisableUser disabled a user account, given a user ID
-func (api *Client) DisableUser(teamName string, uid string) error {
-	return api.DisableUserContext(context.Background(), teamName, uid)
-}
-
-// DisableUserContext disabled a user account, given a user ID with a custom context
-func (api *Client) DisableUserContext(ctx context.Context, teamName string, uid string) error {
-	values := url.Values{
-		"user":       {uid},
-		"token":      {api.config.token},
-		"set_active": {"true"},
-		"_attempts":  {"1"},
-	}
-
-	_, err := adminRequest(ctx, "setInactive", teamName, values, api.debug)
-	if err != nil {
-		return fmt.Errorf("Failed to disable user with id '%s': %s", uid, err)
-	}
-
-	return nil
-}
-
-// InviteGuest invites a user to Slack as a single-channel guest
-func (api *Client) InviteGuest(teamName, channel, firstName, lastName, emailAddress string) error {
-	return api.InviteGuestContext(context.Background(), teamName, channel, firstName, lastName, emailAddress)
-}
-
-// InviteGuestContext invites a user to Slack as a single-channel guest with a custom context
-func (api *Client) InviteGuestContext(ctx context.Context, teamName, channel, firstName, lastName, emailAddress string) error {
-	values := url.Values{
-		"email":            {emailAddress},
-		"channels":         {channel},
-		"first_name":       {firstName},
-		"last_name":        {lastName},
-		"ultra_restricted": {"1"},
-		"token":            {api.config.token},
-		"set_active":       {"true"},
-		"_attempts":        {"1"},
-	}
-
-	_, err := adminRequest(ctx, "invite", teamName, values, api.debug)
-	if err != nil {
-		return fmt.Errorf("Failed to invite single-channel guest: %s", err)
-	}
-
-	return nil
-}
-
-// InviteRestricted invites a user to Slack as a restricted account
-func (api *Client) InviteRestricted(teamName, channel, firstName, lastName, emailAddress string) error {
-	return api.InviteRestrictedContext(context.Background(), teamName, channel, firstName, lastName, emailAddress)
-}
-
-// InviteRestrictedContext invites a user to Slack as a restricted account with a custom context
-func (api *Client) InviteRestrictedContext(ctx context.Context, teamName, channel, firstName, lastName, emailAddress string) error {
-	values := url.Values{
-		"email":      {emailAddress},
-		"channels":   {channel},
-		"first_name": {firstName},
-		"last_name":  {lastName},
-		"restricted": {"1"},
-		"token":      {api.config.token},
-		"set_active": {"true"},
-		"_attempts":  {"1"},
-	}
-
-	_, err := adminRequest(ctx, "invite", teamName, values, api.debug)
-	if err != nil {
-		return fmt.Errorf("Failed to restricted account: %s", err)
-	}
-
-	return nil
-}
-
-// InviteToTeam invites a user to a Slack team
-func (api *Client) InviteToTeam(teamName, firstName, lastName, emailAddress string) error {
-	return api.InviteToTeamContext(context.Background(), teamName, firstName, lastName, emailAddress)
-}
-
-// InviteToTeamContext invites a user to a Slack team with a custom context
-func (api *Client) InviteToTeamContext(ctx context.Context, teamName, firstName, lastName, emailAddress string) error {
-	values := url.Values{
-		"email":      {emailAddress},
-		"first_name": {firstName},
-		"last_name":  {lastName},
-		"token":      {api.config.token},
-		"set_active": {"true"},
-		"_attempts":  {"1"},
-	}
-
-	_, err := adminRequest(ctx, "invite", teamName, values, api.debug)
-	if err != nil {
-		return fmt.Errorf("Failed to invite to team: %s", err)
-	}
-
-	return nil
-}
-
-// SetRegular enables the specified user
-func (api *Client) SetRegular(teamName, user string) error {
-	return api.SetRegularContext(context.Background(), teamName, user)
-}
-
-// SetRegularContext enables the specified user with a custom context
-func (api *Client) SetRegularContext(ctx context.Context, teamName, user string) error {
-	values := url.Values{
-		"user":       {user},
-		"token":      {api.config.token},
-		"set_active": {"true"},
-		"_attempts":  {"1"},
-	}
-
-	_, err := adminRequest(ctx, "setRegular", teamName, values, api.debug)
-	if err != nil {
-		return fmt.Errorf("Failed to change the user (%s) to a regular user: %s", user, err)
-	}
-
-	return nil
-}
-
-// SendSSOBindingEmail sends an SSO binding email to the specified user
-func (api *Client) SendSSOBindingEmail(teamName, user string) error {
-	return api.SendSSOBindingEmailContext(context.Background(), teamName, user)
-}
-
-// SendSSOBindingEmailContext sends an SSO binding email to the specified user with a custom context
-func (api *Client) SendSSOBindingEmailContext(ctx context.Context, teamName, user string) error {
-	values := url.Values{
-		"user":       {user},
-		"token":      {api.config.token},
-		"set_active": {"true"},
-		"_attempts":  {"1"},
-	}
-
-	_, err := adminRequest(ctx, "sendSSOBind", teamName, values, api.debug)
-	if err != nil {
-		return fmt.Errorf("Failed to send SSO binding email for user (%s): %s", user, err)
-	}
-
-	return nil
-}
-
-// SetUltraRestricted converts a user into a single-channel guest
-func (api *Client) SetUltraRestricted(teamName, uid, channel string) error {
-	return api.SetUltraRestrictedContext(context.Background(), teamName, uid, channel)
-}
-
-// SetUltraRestrictedContext converts a user into a single-channel guest with a custom context
-func (api *Client) SetUltraRestrictedContext(ctx context.Context, teamName, uid, channel string) error {
-	values := url.Values{
-		"user":       {uid},
-		"channel":    {channel},
-		"token":      {api.config.token},
-		"set_active": {"true"},
-		"_attempts":  {"1"},
-	}
-
-	_, err := adminRequest(ctx, "setUltraRestricted", teamName, values, api.debug)
-	if err != nil {
-		return fmt.Errorf("Failed to ultra-restrict account: %s", err)
-	}
-
-	return nil
-}
-
-// SetRestricted converts a user into a restricted account
-func (api *Client) SetRestricted(teamName, uid string) error {
-	return api.SetRestrictedContext(context.Background(), teamName, uid)
-}
-
-// SetRestrictedContext converts a user into a restricted account with a custom context
-func (api *Client) SetRestrictedContext(ctx context.Context, teamName, uid string) error {
-	values := url.Values{
-		"user":       {uid},
-		"token":      {api.config.token},
-		"set_active": {"true"},
-		"_attempts":  {"1"},
-	}
-
-	_, err := adminRequest(ctx, "setRestricted", teamName, values, api.debug)
-	if err != nil {
-		return fmt.Errorf("Failed to restrict account: %s", err)
-	}
-
-	return nil
-}
diff --git a/vendor/github.com/matterbridge/slack/attachments.go b/vendor/github.com/matterbridge/slack/attachments.go
deleted file mode 100644
index c5a66d96..00000000
--- a/vendor/github.com/matterbridge/slack/attachments.go
+++ /dev/null
@@ -1,96 +0,0 @@
-package slack
-
-import "encoding/json"
-
-// AttachmentField contains information for an attachment field
-// An Attachment can contain multiple of these
-type AttachmentField struct {
-	Title string `json:"title"`
-	Value string `json:"value"`
-	Short bool   `json:"short"`
-}
-
-// AttachmentAction is a button or menu to be included in the attachment. Required when
-// using message buttons or menus and otherwise not useful. A maximum of 5 actions may be
-// provided per attachment.
-type AttachmentAction struct {
-	Name            string                        `json:"name"`                       // Required.
-	Text            string                        `json:"text"`                       // Required.
-	Style           string                        `json:"style,omitempty"`            // Optional. Allowed values: "default", "primary", "danger".
-	Type            string                        `json:"type"`                       // Required. Must be set to "button" or "select".
-	Value           string                        `json:"value,omitempty"`            // Optional.
-	DataSource      string                        `json:"data_source,omitempty"`      // Optional.
-	MinQueryLength  int                           `json:"min_query_length,omitempty"` // Optional. Default value is 1.
-	Options         []AttachmentActionOption      `json:"options,omitempty"`          // Optional. Maximum of 100 options can be provided in each menu.
-	SelectedOptions []AttachmentActionOption      `json:"selected_options,omitempty"` // Optional. The first element of this array will be set as the pre-selected option for this menu.
-	OptionGroups    []AttachmentActionOptionGroup `json:"option_groups,omitempty"`    // Optional.
-	Confirm         *ConfirmationField            `json:"confirm,omitempty"`          // Optional.
-}
-
-// AttachmentActionOption the individual option to appear in action menu.
-type AttachmentActionOption struct {
-	Text        string `json:"text"`                  // Required.
-	Value       string `json:"value"`                 // Required.
-	Description string `json:"description,omitempty"` // Optional. Up to 30 characters.
-}
-
-// AttachmentActionOptionGroup is a semi-hierarchal way to list available options to appear in action menu.
-type AttachmentActionOptionGroup struct {
-	Text    string                   `json:"text"`    // Required.
-	Options []AttachmentActionOption `json:"options"` // Required.
-}
-
-// AttachmentActionCallback is sent from Slack when a user clicks a button in an interactive message (aka AttachmentAction)
-type AttachmentActionCallback struct {
-	Actions    []AttachmentAction `json:"actions"`
-	CallbackID string             `json:"callback_id"`
-	Team       Team               `json:"team"`
-	Channel    Channel            `json:"channel"`
-	User       User               `json:"user"`
-
-	OriginalMessage Message `json:"original_message"`
-
-	ActionTs     string `json:"action_ts"`
-	MessageTs    string `json:"message_ts"`
-	AttachmentID string `json:"attachment_id"`
-	Token        string `json:"token"`
-	ResponseURL  string `json:"response_url"`
-}
-
-// ConfirmationField are used to ask users to confirm actions
-type ConfirmationField struct {
-	Title       string `json:"title,omitempty"`        // Optional.
-	Text        string `json:"text"`                   // Required.
-	OkText      string `json:"ok_text,omitempty"`      // Optional. Defaults to "Okay"
-	DismissText string `json:"dismiss_text,omitempty"` // Optional. Defaults to "Cancel"
-}
-
-// Attachment contains all the information for an attachment
-type Attachment struct {
-	Color    string `json:"color,omitempty"`
-	Fallback string `json:"fallback"`
-
-	CallbackID string `json:"callback_id,omitempty"`
-
-	AuthorName    string `json:"author_name,omitempty"`
-	AuthorSubname string `json:"author_subname,omitempty"`
-	AuthorLink    string `json:"author_link,omitempty"`
-	AuthorIcon    string `json:"author_icon,omitempty"`
-
-	Title     string `json:"title,omitempty"`
-	TitleLink string `json:"title_link,omitempty"`
-	Pretext   string `json:"pretext,omitempty"`
-	Text      string `json:"text"`
-
-	ImageURL string `json:"image_url,omitempty"`
-	ThumbURL string `json:"thumb_url,omitempty"`
-
-	Fields     []AttachmentField  `json:"fields,omitempty"`
-	Actions    []AttachmentAction `json:"actions,omitempty"`
-	MarkdownIn []string           `json:"mrkdwn_in,omitempty"`
-
-	Footer     string `json:"footer,omitempty"`
-	FooterIcon string `json:"footer_icon,omitempty"`
-
-	Ts json.Number `json:"ts,omitempty"`
-}
diff --git a/vendor/github.com/matterbridge/slack/backoff.go b/vendor/github.com/matterbridge/slack/backoff.go
deleted file mode 100644
index e555a1ad..00000000
--- a/vendor/github.com/matterbridge/slack/backoff.go
+++ /dev/null
@@ -1,57 +0,0 @@
-package slack
-
-import (
-	"math"
-	"math/rand"
-	"time"
-)
-
-// This one was ripped from https://github.com/jpillora/backoff/blob/master/backoff.go
-
-// Backoff is a time.Duration counter. It starts at Min.  After every
-// call to Duration() it is multiplied by Factor.  It is capped at
-// Max. It returns to Min on every call to Reset().  Used in
-// conjunction with the time package.
-type backoff struct {
-	attempts int
-	//Factor is the multiplying factor for each increment step
-	Factor float64
-	//Jitter eases contention by randomizing backoff steps
-	Jitter bool
-	//Min and Max are the minimum and maximum values of the counter
-	Min, Max time.Duration
-}
-
-// Returns the current value of the counter and then multiplies it
-// Factor
-func (b *backoff) Duration() time.Duration {
-	//Zero-values are nonsensical, so we use
-	//them to apply defaults
-	if b.Min == 0 {
-		b.Min = 100 * time.Millisecond
-	}
-	if b.Max == 0 {
-		b.Max = 10 * time.Second
-	}
-	if b.Factor == 0 {
-		b.Factor = 2
-	}
-	//calculate this duration
-	dur := float64(b.Min) * math.Pow(b.Factor, float64(b.attempts))
-	if b.Jitter == true {
-		dur = rand.Float64()*(dur-float64(b.Min)) + float64(b.Min)
-	}
-	//cap!
-	if dur > float64(b.Max) {
-		return b.Max
-	}
-	//bump attempts count
-	b.attempts++
-	//return as a time.Duration
-	return time.Duration(dur)
-}
-
-//Resets the current value of the counter back to Min
-func (b *backoff) Reset() {
-	b.attempts = 0
-}
diff --git a/vendor/github.com/matterbridge/slack/bots.go b/vendor/github.com/matterbridge/slack/bots.go
deleted file mode 100644
index 13a78cb1..00000000
--- a/vendor/github.com/matterbridge/slack/bots.go
+++ /dev/null
@@ -1,50 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-)
-
-// Bot contains information about a bot
-type Bot struct {
-	ID      string `json:"id"`
-	Name    string `json:"name"`
-	Deleted bool   `json:"deleted"`
-	Icons   Icons  `json:"icons"`
-}
-
-type botResponseFull struct {
-	Bot `json:"bot,omitempty"` // GetBotInfo
-	SlackResponse
-}
-
-func botRequest(ctx context.Context, path string, values url.Values, debug bool) (*botResponseFull, error) {
-	response := &botResponseFull{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-// GetBotInfo will retrieve the complete bot information
-func (api *Client) GetBotInfo(bot string) (*Bot, error) {
-	return api.GetBotInfoContext(context.Background(), bot)
-}
-
-// GetBotInfoContext will retrieve the complete bot information using a custom context
-func (api *Client) GetBotInfoContext(ctx context.Context, bot string) (*Bot, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"bot":   {bot},
-	}
-	response, err := botRequest(ctx, "bots.info", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Bot, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/channels.go b/vendor/github.com/matterbridge/slack/channels.go
deleted file mode 100644
index 4a67b2fb..00000000
--- a/vendor/github.com/matterbridge/slack/channels.go
+++ /dev/null
@@ -1,350 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-	"strconv"
-)
-
-type channelResponseFull struct {
-	Channel      Channel   `json:"channel"`
-	Channels     []Channel `json:"channels"`
-	Purpose      string    `json:"purpose"`
-	Topic        string    `json:"topic"`
-	NotInChannel bool      `json:"not_in_channel"`
-	History
-	SlackResponse
-}
-
-// Channel contains information about the channel
-type Channel struct {
-	groupConversation
-	IsChannel bool `json:"is_channel"`
-	IsGeneral bool `json:"is_general"`
-	IsMember  bool `json:"is_member"`
-}
-
-func channelRequest(ctx context.Context, path string, values url.Values, debug bool) (*channelResponseFull, error) {
-	response := &channelResponseFull{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-// ArchiveChannel archives the given channel
-func (api *Client) ArchiveChannel(channel string) error {
-	return api.ArchiveChannelContext(context.Background(), channel)
-}
-
-// ArchiveChannelContext archives the given channel with a custom context
-func (api *Client) ArchiveChannelContext(ctx context.Context, channel string) error {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-	}
-	_, err := channelRequest(ctx, "channels.archive", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// UnarchiveChannel unarchives the given channel
-func (api *Client) UnarchiveChannel(channel string) error {
-	return api.UnarchiveChannelContext(context.Background(), channel)
-}
-
-// UnarchiveChannelContext unarchives the given channel with a custom context
-func (api *Client) UnarchiveChannelContext(ctx context.Context, channel string) error {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-	}
-	_, err := channelRequest(ctx, "channels.unarchive", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// CreateChannel creates a channel with the given name and returns a *Channel
-func (api *Client) CreateChannel(channel string) (*Channel, error) {
-	return api.CreateChannelContext(context.Background(), channel)
-}
-
-// CreateChannelContext creates a channel with the given name and returns a *Channel with a custom context
-func (api *Client) CreateChannelContext(ctx context.Context, channel string) (*Channel, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"name":  {channel},
-	}
-	response, err := channelRequest(ctx, "channels.create", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Channel, nil
-}
-
-// GetChannelHistory retrieves the channel history
-func (api *Client) GetChannelHistory(channel string, params HistoryParameters) (*History, error) {
-	return api.GetChannelHistoryContext(context.Background(), channel, params)
-}
-
-// GetChannelHistoryContext retrieves the channel history with a custom context
-func (api *Client) GetChannelHistoryContext(ctx context.Context, channel string, params HistoryParameters) (*History, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-	}
-	if params.Latest != DEFAULT_HISTORY_LATEST {
-		values.Add("latest", params.Latest)
-	}
-	if params.Oldest != DEFAULT_HISTORY_OLDEST {
-		values.Add("oldest", params.Oldest)
-	}
-	if params.Count != DEFAULT_HISTORY_COUNT {
-		values.Add("count", strconv.Itoa(params.Count))
-	}
-	if params.Inclusive != DEFAULT_HISTORY_INCLUSIVE {
-		if params.Inclusive {
-			values.Add("inclusive", "1")
-		} else {
-			values.Add("inclusive", "0")
-		}
-	}
-	if params.Unreads != DEFAULT_HISTORY_UNREADS {
-		if params.Unreads {
-			values.Add("unreads", "1")
-		} else {
-			values.Add("unreads", "0")
-		}
-	}
-	response, err := channelRequest(ctx, "channels.history", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.History, nil
-}
-
-// GetChannelInfo retrieves the given channel
-func (api *Client) GetChannelInfo(channel string) (*Channel, error) {
-	return api.GetChannelInfoContext(context.Background(), channel)
-}
-
-// GetChannelInfoContext retrieves the given channel with a custom context
-func (api *Client) GetChannelInfoContext(ctx context.Context, channel string) (*Channel, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-	}
-	response, err := channelRequest(ctx, "channels.info", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Channel, nil
-}
-
-// InviteUserToChannel invites a user to a given channel and returns a *Channel
-func (api *Client) InviteUserToChannel(channel, user string) (*Channel, error) {
-	return api.InviteUserToChannelContext(context.Background(), channel, user)
-}
-
-// InviteUserToChannelCustom invites a user to a given channel and returns a *Channel with a custom context
-func (api *Client) InviteUserToChannelContext(ctx context.Context, channel, user string) (*Channel, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-		"user":    {user},
-	}
-	response, err := channelRequest(ctx, "channels.invite", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Channel, nil
-}
-
-// JoinChannel joins the currently authenticated user to a channel
-func (api *Client) JoinChannel(channel string) (*Channel, error) {
-	return api.JoinChannelContext(context.Background(), channel)
-}
-
-// JoinChannelContext joins the currently authenticated user to a channel with a custom context
-func (api *Client) JoinChannelContext(ctx context.Context, channel string) (*Channel, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"name":  {channel},
-	}
-	response, err := channelRequest(ctx, "channels.join", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Channel, nil
-}
-
-// LeaveChannel makes the authenticated user leave the given channel
-func (api *Client) LeaveChannel(channel string) (bool, error) {
-	return api.LeaveChannelContext(context.Background(), channel)
-}
-
-// LeaveChannelContext makes the authenticated user leave the given channel with a custom context
-func (api *Client) LeaveChannelContext(ctx context.Context, channel string) (bool, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-	}
-	response, err := channelRequest(ctx, "channels.leave", values, api.debug)
-	if err != nil {
-		return false, err
-	}
-	if response.NotInChannel {
-		return response.NotInChannel, nil
-	}
-	return false, nil
-}
-
-// KickUserFromChannel kicks a user from a given channel
-func (api *Client) KickUserFromChannel(channel, user string) error {
-	return api.KickUserFromChannelContext(context.Background(), channel, user)
-}
-
-// KickUserFromChannelContext kicks a user from a given channel with a custom context
-func (api *Client) KickUserFromChannelContext(ctx context.Context, channel, user string) error {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-		"user":    {user},
-	}
-	_, err := channelRequest(ctx, "channels.kick", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// GetChannels retrieves all the channels
-func (api *Client) GetChannels(excludeArchived bool) ([]Channel, error) {
-	return api.GetChannelsContext(context.Background(), excludeArchived)
-}
-
-// GetChannelsContext retrieves all the channels with a custom context
-func (api *Client) GetChannelsContext(ctx context.Context, excludeArchived bool) ([]Channel, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if excludeArchived {
-		values.Add("exclude_archived", "1")
-	}
-	response, err := channelRequest(ctx, "channels.list", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return response.Channels, nil
-}
-
-// SetChannelReadMark sets the read mark of a given channel to a specific point
-// Clients should try to avoid making this call too often. When needing to mark a read position, a client should set a
-// timer before making the call. In this way, any further updates needed during the timeout will not generate extra calls
-// (just one per channel). This is useful for when reading scroll-back history, or following a busy live channel. A
-// timeout of 5 seconds is a good starting point. Be sure to flush these calls on shutdown/logout.
-func (api *Client) SetChannelReadMark(channel, ts string) error {
-	return api.SetChannelReadMarkContext(context.Background(), channel, ts)
-}
-
-// SetChannelReadMarkContext sets the read mark of a given channel to a specific point with a custom context
-// For more details see SetChannelReadMark documentation
-func (api *Client) SetChannelReadMarkContext(ctx context.Context, channel, ts string) error {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-		"ts":      {ts},
-	}
-	_, err := channelRequest(ctx, "channels.mark", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// RenameChannel renames a given channel
-func (api *Client) RenameChannel(channel, name string) (*Channel, error) {
-	return api.RenameChannelContext(context.Background(), channel, name)
-}
-
-// RenameChannelContext renames a given channel with a custom context
-func (api *Client) RenameChannelContext(ctx context.Context, channel, name string) (*Channel, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-		"name":    {name},
-	}
-	// XXX: the created entry in this call returns a string instead of a number
-	// so I may have to do some workaround to solve it.
-	response, err := channelRequest(ctx, "channels.rename", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Channel, nil
-}
-
-// SetChannelPurpose sets the channel purpose and returns the purpose that was successfully set
-func (api *Client) SetChannelPurpose(channel, purpose string) (string, error) {
-	return api.SetChannelPurposeContext(context.Background(), channel, purpose)
-}
-
-// SetChannelPurposeContext sets the channel purpose and returns the purpose that was successfully set with a custom context
-func (api *Client) SetChannelPurposeContext(ctx context.Context, channel, purpose string) (string, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-		"purpose": {purpose},
-	}
-	response, err := channelRequest(ctx, "channels.setPurpose", values, api.debug)
-	if err != nil {
-		return "", err
-	}
-	return response.Purpose, nil
-}
-
-// SetChannelTopic sets the channel topic and returns the topic that was successfully set
-func (api *Client) SetChannelTopic(channel, topic string) (string, error) {
-	return api.SetChannelTopicContext(context.Background(), channel, topic)
-}
-
-// SetChannelTopicContext sets the channel topic and returns the topic that was successfully set with a custom context
-func (api *Client) SetChannelTopicContext(ctx context.Context, channel, topic string) (string, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-		"topic":   {topic},
-	}
-	response, err := channelRequest(ctx, "channels.setTopic", values, api.debug)
-	if err != nil {
-		return "", err
-	}
-	return response.Topic, nil
-}
-
-// GetChannelReplies gets an entire thread (a message plus all the messages in reply to it).
-func (api *Client) GetChannelReplies(channel, thread_ts string) ([]Message, error) {
-	return api.GetChannelRepliesContext(context.Background(), channel, thread_ts)
-}
-
-// GetChannelRepliesContext gets an entire thread (a message plus all the messages in reply to it) with a custom context
-func (api *Client) GetChannelRepliesContext(ctx context.Context, channel, thread_ts string) ([]Message, error) {
-	values := url.Values{
-		"token":     {api.config.token},
-		"channel":   {channel},
-		"thread_ts": {thread_ts},
-	}
-	response, err := channelRequest(ctx, "channels.replies", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return response.History.Messages, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/chat.go b/vendor/github.com/matterbridge/slack/chat.go
deleted file mode 100644
index 9a2c4453..00000000
--- a/vendor/github.com/matterbridge/slack/chat.go
+++ /dev/null
@@ -1,320 +0,0 @@
-package slack
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"net/url"
-	"strings"
-)
-
-const (
-	DEFAULT_MESSAGE_USERNAME         = ""
-	DEFAULT_MESSAGE_THREAD_TIMESTAMP = ""
-	DEFAULT_MESSAGE_ASUSER           = false
-	DEFAULT_MESSAGE_PARSE            = ""
-	DEFAULT_MESSAGE_LINK_NAMES       = 0
-	DEFAULT_MESSAGE_UNFURL_LINKS     = false
-	DEFAULT_MESSAGE_UNFURL_MEDIA     = true
-	DEFAULT_MESSAGE_ICON_URL         = ""
-	DEFAULT_MESSAGE_ICON_EMOJI       = ""
-	DEFAULT_MESSAGE_MARKDOWN         = true
-	DEFAULT_MESSAGE_ESCAPE_TEXT      = true
-)
-
-type chatResponseFull struct {
-	Channel   string `json:"channel"`
-	Timestamp string `json:"ts"`
-	Text      string `json:"text"`
-	SlackResponse
-}
-
-// PostMessageParameters contains all the parameters necessary (including the optional ones) for a PostMessage() request
-type PostMessageParameters struct {
-	Text            string       `json:"text"`
-	Username        string       `json:"user_name"`
-	AsUser          bool         `json:"as_user"`
-	Parse           string       `json:"parse"`
-	ThreadTimestamp string       `json:"thread_ts"`
-	LinkNames       int          `json:"link_names"`
-	Attachments     []Attachment `json:"attachments"`
-	UnfurlLinks     bool         `json:"unfurl_links"`
-	UnfurlMedia     bool         `json:"unfurl_media"`
-	IconURL         string       `json:"icon_url"`
-	IconEmoji       string       `json:"icon_emoji"`
-	Markdown        bool         `json:"mrkdwn,omitempty"`
-	EscapeText      bool         `json:"escape_text"`
-}
-
-// NewPostMessageParameters provides an instance of PostMessageParameters with all the sane default values set
-func NewPostMessageParameters() PostMessageParameters {
-	return PostMessageParameters{
-		Username:    DEFAULT_MESSAGE_USERNAME,
-		AsUser:      DEFAULT_MESSAGE_ASUSER,
-		Parse:       DEFAULT_MESSAGE_PARSE,
-		LinkNames:   DEFAULT_MESSAGE_LINK_NAMES,
-		Attachments: nil,
-		UnfurlLinks: DEFAULT_MESSAGE_UNFURL_LINKS,
-		UnfurlMedia: DEFAULT_MESSAGE_UNFURL_MEDIA,
-		IconURL:     DEFAULT_MESSAGE_ICON_URL,
-		IconEmoji:   DEFAULT_MESSAGE_ICON_EMOJI,
-		Markdown:    DEFAULT_MESSAGE_MARKDOWN,
-		EscapeText:  DEFAULT_MESSAGE_ESCAPE_TEXT,
-	}
-}
-
-// DeleteMessage deletes a message in a channel
-func (api *Client) DeleteMessage(channel, messageTimestamp string) (string, string, error) {
-	respChannel, respTimestamp, _, err := api.SendMessageContext(context.Background(), channel, MsgOptionDelete(messageTimestamp))
-	return respChannel, respTimestamp, err
-}
-
-// DeleteMessageContext deletes a message in a channel with a custom context
-func (api *Client) DeleteMessageContext(ctx context.Context, channel, messageTimestamp string) (string, string, error) {
-	respChannel, respTimestamp, _, err := api.SendMessageContext(ctx, channel, MsgOptionDelete(messageTimestamp))
-	return respChannel, respTimestamp, err
-}
-
-// PostMessage sends a message to a channel.
-// Message is escaped by default according to https://api.slack.com/docs/formatting
-// Use http://davestevens.github.io/slack-message-builder/ to help crafting your message.
-func (api *Client) PostMessage(channel, text string, params PostMessageParameters) (string, string, error) {
-	respChannel, respTimestamp, _, err := api.SendMessageContext(
-		context.Background(),
-		channel,
-		MsgOptionText(text, params.EscapeText),
-		MsgOptionAttachments(params.Attachments...),
-		MsgOptionPostMessageParameters(params),
-	)
-	return respChannel, respTimestamp, err
-}
-
-// PostMessageContext sends a message to a channel with a custom context
-// For more details, see PostMessage documentation
-func (api *Client) PostMessageContext(ctx context.Context, channel, text string, params PostMessageParameters) (string, string, error) {
-	respChannel, respTimestamp, _, err := api.SendMessageContext(
-		ctx,
-		channel,
-		MsgOptionText(text, params.EscapeText),
-		MsgOptionAttachments(params.Attachments...),
-		MsgOptionPostMessageParameters(params),
-	)
-	return respChannel, respTimestamp, err
-}
-
-// UpdateMessage updates a message in a channel
-func (api *Client) UpdateMessage(channel, timestamp, text string) (string, string, string, error) {
-	return api.UpdateMessageContext(context.Background(), channel, timestamp, text)
-}
-
-// UpdateMessage updates a message in a channel
-func (api *Client) UpdateMessageContext(ctx context.Context, channel, timestamp, text string) (string, string, string, error) {
-	return api.SendMessageContext(ctx, channel, MsgOptionUpdate(timestamp), MsgOptionText(text, true))
-}
-
-// SendMessage more flexible method for configuring messages.
-func (api *Client) SendMessage(channel string, options ...MsgOption) (string, string, string, error) {
-	return api.SendMessageContext(context.Background(), channel, options...)
-}
-
-// SendMessageContext more flexible method for configuring messages with a custom context.
-func (api *Client) SendMessageContext(ctx context.Context, channel string, options ...MsgOption) (string, string, string, error) {
-	channel, values, err := ApplyMsgOptions(api.config.token, channel, options...)
-	if err != nil {
-		return "", "", "", err
-	}
-
-	response, err := chatRequest(ctx, channel, values, api.debug)
-	if err != nil {
-		return "", "", "", err
-	}
-
-	return response.Channel, response.Timestamp, response.Text, nil
-}
-
-// ApplyMsgOptions utility function for debugging/testing chat requests.
-func ApplyMsgOptions(token, channel string, options ...MsgOption) (string, url.Values, error) {
-	config := sendConfig{
-		mode: chatPostMessage,
-		values: url.Values{
-			"token":   {token},
-			"channel": {channel},
-		},
-	}
-
-	for _, opt := range options {
-		if err := opt(&config); err != nil {
-			return string(config.mode), config.values, err
-		}
-	}
-
-	return string(config.mode), config.values, nil
-}
-
-func escapeMessage(message string) string {
-	replacer := strings.NewReplacer("&", "&amp;", "<", "&lt;", ">", "&gt;")
-	return replacer.Replace(message)
-}
-
-func chatRequest(ctx context.Context, path string, values url.Values, debug bool) (*chatResponseFull, error) {
-	response := &chatResponseFull{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-type sendMode string
-
-const (
-	chatUpdate      sendMode = "chat.update"
-	chatPostMessage sendMode = "chat.postMessage"
-	chatDelete      sendMode = "chat.delete"
-)
-
-type sendConfig struct {
-	mode   sendMode
-	values url.Values
-}
-
-// MsgOption option provided when sending a message.
-type MsgOption func(*sendConfig) error
-
-// MsgOptionPost posts a messages, this is the default.
-func MsgOptionPost() MsgOption {
-	return func(config *sendConfig) error {
-		config.mode = chatPostMessage
-		config.values.Del("ts")
-		return nil
-	}
-}
-
-// MsgOptionUpdate updates a message based on the timestamp.
-func MsgOptionUpdate(timestamp string) MsgOption {
-	return func(config *sendConfig) error {
-		config.mode = chatUpdate
-		config.values.Add("ts", timestamp)
-		return nil
-	}
-}
-
-// MsgOptionDelete deletes a message based on the timestamp.
-func MsgOptionDelete(timestamp string) MsgOption {
-	return func(config *sendConfig) error {
-		config.mode = chatDelete
-		config.values.Add("ts", timestamp)
-		return nil
-	}
-}
-
-// MsgOptionAsUser whether or not to send the message as the user.
-func MsgOptionAsUser(b bool) MsgOption {
-	return func(config *sendConfig) error {
-		if b != DEFAULT_MESSAGE_ASUSER {
-			config.values.Set("as_user", "true")
-		}
-		return nil
-	}
-}
-
-// MsgOptionText provide the text for the message, optionally escape the provided
-// text.
-func MsgOptionText(text string, escape bool) MsgOption {
-	return func(config *sendConfig) error {
-		if escape {
-			text = escapeMessage(text)
-		}
-		config.values.Add("text", text)
-		return nil
-	}
-}
-
-// MsgOptionAttachments provide attachments for the message.
-func MsgOptionAttachments(attachments ...Attachment) MsgOption {
-	return func(config *sendConfig) error {
-		if attachments == nil {
-			return nil
-		}
-
-		attachments, err := json.Marshal(attachments)
-		if err == nil {
-			config.values.Set("attachments", string(attachments))
-		}
-		return err
-	}
-}
-
-// MsgOptionEnableLinkUnfurl enables link unfurling
-func MsgOptionEnableLinkUnfurl() MsgOption {
-	return func(config *sendConfig) error {
-		config.values.Set("unfurl_links", "true")
-		return nil
-	}
-}
-
-// MsgOptionDisableMediaUnfurl disables media unfurling.
-func MsgOptionDisableMediaUnfurl() MsgOption {
-	return func(config *sendConfig) error {
-		config.values.Set("unfurl_media", "false")
-		return nil
-	}
-}
-
-// MsgOptionDisableMarkdown disables markdown.
-func MsgOptionDisableMarkdown() MsgOption {
-	return func(config *sendConfig) error {
-		config.values.Set("mrkdwn", "false")
-		return nil
-	}
-}
-
-// MsgOptionPostMessageParameters maintain backwards compatibility.
-func MsgOptionPostMessageParameters(params PostMessageParameters) MsgOption {
-	return func(config *sendConfig) error {
-		if params.Username != DEFAULT_MESSAGE_USERNAME {
-			config.values.Set("username", string(params.Username))
-		}
-
-		// never generates an error.
-		MsgOptionAsUser(params.AsUser)(config)
-
-		if params.Parse != DEFAULT_MESSAGE_PARSE {
-			config.values.Set("parse", string(params.Parse))
-		}
-		if params.LinkNames != DEFAULT_MESSAGE_LINK_NAMES {
-			config.values.Set("link_names", "1")
-		}
-
-		if params.UnfurlLinks != DEFAULT_MESSAGE_UNFURL_LINKS {
-			config.values.Set("unfurl_links", "true")
-		}
-
-		// I want to send a message with explicit `as_user` `true` and `unfurl_links` `false` in request.
-		// Because setting `as_user` to `true` will change the default value for `unfurl_links` to `true` on Slack API side.
-		if params.AsUser != DEFAULT_MESSAGE_ASUSER && params.UnfurlLinks == DEFAULT_MESSAGE_UNFURL_LINKS {
-			config.values.Set("unfurl_links", "false")
-		}
-		if params.UnfurlMedia != DEFAULT_MESSAGE_UNFURL_MEDIA {
-			config.values.Set("unfurl_media", "false")
-		}
-		if params.IconURL != DEFAULT_MESSAGE_ICON_URL {
-			config.values.Set("icon_url", params.IconURL)
-		}
-		if params.IconEmoji != DEFAULT_MESSAGE_ICON_EMOJI {
-			config.values.Set("icon_emoji", params.IconEmoji)
-		}
-		if params.Markdown != DEFAULT_MESSAGE_MARKDOWN {
-			config.values.Set("mrkdwn", "false")
-		}
-
-		if params.ThreadTimestamp != DEFAULT_MESSAGE_THREAD_TIMESTAMP {
-			config.values.Set("thread_ts", params.ThreadTimestamp)
-		}
-
-		return nil
-	}
-}
diff --git a/vendor/github.com/matterbridge/slack/comment.go b/vendor/github.com/matterbridge/slack/comment.go
deleted file mode 100644
index 7d1c0d4e..00000000
--- a/vendor/github.com/matterbridge/slack/comment.go
+++ /dev/null
@@ -1,10 +0,0 @@
-package slack
-
-// Comment contains all the information relative to a comment
-type Comment struct {
-	ID        string   `json:"id,omitempty"`
-	Created   JSONTime `json:"created,omitempty"`
-	Timestamp JSONTime `json:"timestamp,omitempty"`
-	User      string   `json:"user,omitempty"`
-	Comment   string   `json:"comment,omitempty"`
-}
diff --git a/vendor/github.com/matterbridge/slack/conversation.go b/vendor/github.com/matterbridge/slack/conversation.go
deleted file mode 100644
index 83a1d4ee..00000000
--- a/vendor/github.com/matterbridge/slack/conversation.go
+++ /dev/null
@@ -1,37 +0,0 @@
-package slack
-
-// Conversation is the foundation for IM and BaseGroupConversation
-type conversation struct {
-	ID                 string   `json:"id"`
-	Created            JSONTime `json:"created"`
-	IsOpen             bool     `json:"is_open"`
-	LastRead           string   `json:"last_read,omitempty"`
-	Latest             *Message `json:"latest,omitempty"`
-	UnreadCount        int      `json:"unread_count,omitempty"`
-	UnreadCountDisplay int      `json:"unread_count_display,omitempty"`
-}
-
-// GroupConversation is the foundation for Group and Channel
-type groupConversation struct {
-	conversation
-	Name       string   `json:"name"`
-	Creator    string   `json:"creator"`
-	IsArchived bool     `json:"is_archived"`
-	Members    []string `json:"members"`
-	Topic      Topic    `json:"topic"`
-	Purpose    Purpose  `json:"purpose"`
-}
-
-// Topic contains information about the topic
-type Topic struct {
-	Value   string   `json:"value"`
-	Creator string   `json:"creator"`
-	LastSet JSONTime `json:"last_set"`
-}
-
-// Purpose contains information about the purpose
-type Purpose struct {
-	Value   string   `json:"value"`
-	Creator string   `json:"creator"`
-	LastSet JSONTime `json:"last_set"`
-}
diff --git a/vendor/github.com/matterbridge/slack/dnd.go b/vendor/github.com/matterbridge/slack/dnd.go
deleted file mode 100644
index 4f1b3228..00000000
--- a/vendor/github.com/matterbridge/slack/dnd.go
+++ /dev/null
@@ -1,150 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-	"strconv"
-	"strings"
-)
-
-type SnoozeDebug struct {
-	SnoozeEndDate string `json:"snooze_end_date"`
-}
-
-type SnoozeInfo struct {
-	SnoozeEnabled   bool        `json:"snooze_enabled,omitempty"`
-	SnoozeEndTime   int         `json:"snooze_endtime,omitempty"`
-	SnoozeRemaining int         `json:"snooze_remaining,omitempty"`
-	SnoozeDebug     SnoozeDebug `json:"snooze_debug,omitempty"`
-}
-
-type DNDStatus struct {
-	Enabled            bool `json:"dnd_enabled"`
-	NextStartTimestamp int  `json:"next_dnd_start_ts"`
-	NextEndTimestamp   int  `json:"next_dnd_end_ts"`
-	SnoozeInfo
-}
-
-type dndResponseFull struct {
-	DNDStatus
-	SlackResponse
-}
-
-type dndTeamInfoResponse struct {
-	Users map[string]DNDStatus `json:"users"`
-	SlackResponse
-}
-
-func dndRequest(ctx context.Context, path string, values url.Values, debug bool) (*dndResponseFull, error) {
-	response := &dndResponseFull{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-// EndDND ends the user's scheduled Do Not Disturb session
-func (api *Client) EndDND() error {
-	return api.EndDNDContext(context.Background())
-}
-
-// EndDNDContext ends the user's scheduled Do Not Disturb session with a custom context
-func (api *Client) EndDNDContext(ctx context.Context) error {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-
-	response := &SlackResponse{}
-	if err := post(ctx, "dnd.endDnd", values, response, api.debug); err != nil {
-		return err
-	}
-	if !response.Ok {
-		return errors.New(response.Error)
-	}
-	return nil
-}
-
-// EndSnooze ends the current user's snooze mode
-func (api *Client) EndSnooze() (*DNDStatus, error) {
-	return api.EndSnoozeContext(context.Background())
-}
-
-// EndSnoozeContext ends the current user's snooze mode with a custom context
-func (api *Client) EndSnoozeContext(ctx context.Context) (*DNDStatus, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-
-	response, err := dndRequest(ctx, "dnd.endSnooze", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.DNDStatus, nil
-}
-
-// GetDNDInfo provides information about a user's current Do Not Disturb settings.
-func (api *Client) GetDNDInfo(user *string) (*DNDStatus, error) {
-	return api.GetDNDInfoContext(context.Background(), user)
-}
-
-// GetDNDInfoContext provides information about a user's current Do Not Disturb settings with a custom context.
-func (api *Client) GetDNDInfoContext(ctx context.Context, user *string) (*DNDStatus, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if user != nil {
-		values.Set("user", *user)
-	}
-	response, err := dndRequest(ctx, "dnd.info", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.DNDStatus, nil
-}
-
-// GetDNDTeamInfo provides information about a user's current Do Not Disturb settings.
-func (api *Client) GetDNDTeamInfo(users []string) (map[string]DNDStatus, error) {
-	return api.GetDNDTeamInfoContext(context.Background(), users)
-}
-
-// GetDNDTeamInfoContext provides information about a user's current Do Not Disturb settings with a custom context.
-func (api *Client) GetDNDTeamInfoContext(ctx context.Context, users []string) (map[string]DNDStatus, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"users": {strings.Join(users, ",")},
-	}
-	response := &dndTeamInfoResponse{}
-	if err := post(ctx, "dnd.teamInfo", values, response, api.debug); err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response.Users, nil
-}
-
-// SetSnooze adjusts the snooze duration for a user's Do Not Disturb
-// settings. If a snooze session is not already active for the user, invoking
-// this method will begin one for the specified duration.
-func (api *Client) SetSnooze(minutes int) (*DNDStatus, error) {
-	return api.SetSnoozeContext(context.Background(), minutes)
-}
-
-// SetSnooze adjusts the snooze duration for a user's Do Not Disturb settings with a custom context.
-// For more information see the SetSnooze docs
-func (api *Client) SetSnoozeContext(ctx context.Context, minutes int) (*DNDStatus, error) {
-	values := url.Values{
-		"token":       {api.config.token},
-		"num_minutes": {strconv.Itoa(minutes)},
-	}
-	response, err := dndRequest(ctx, "dnd.setSnooze", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.DNDStatus, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/emoji.go b/vendor/github.com/matterbridge/slack/emoji.go
deleted file mode 100644
index 5da9da41..00000000
--- a/vendor/github.com/matterbridge/slack/emoji.go
+++ /dev/null
@@ -1,33 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-)
-
-type emojiResponseFull struct {
-	Emoji map[string]string `json:"emoji"`
-	SlackResponse
-}
-
-// GetEmoji retrieves all the emojis
-func (api *Client) GetEmoji() (map[string]string, error) {
-	return api.GetEmojiContext(context.Background())
-}
-
-// GetEmojiContext retrieves all the emojis with a custom context
-func (api *Client) GetEmojiContext(ctx context.Context) (map[string]string, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	response := &emojiResponseFull{}
-	err := post(ctx, "emoji.list", values, response, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response.Emoji, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/files.go b/vendor/github.com/matterbridge/slack/files.go
deleted file mode 100644
index fc4b7e23..00000000
--- a/vendor/github.com/matterbridge/slack/files.go
+++ /dev/null
@@ -1,311 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"io"
-	"net/url"
-	"strconv"
-	"strings"
-)
-
-const (
-	// Add here the defaults in the siten
-	DEFAULT_FILES_USER    = ""
-	DEFAULT_FILES_CHANNEL = ""
-	DEFAULT_FILES_TS_FROM = 0
-	DEFAULT_FILES_TS_TO   = -1
-	DEFAULT_FILES_TYPES   = "all"
-	DEFAULT_FILES_COUNT   = 100
-	DEFAULT_FILES_PAGE    = 1
-)
-
-// File contains all the information for a file
-type File struct {
-	ID        string   `json:"id"`
-	Created   JSONTime `json:"created"`
-	Timestamp JSONTime `json:"timestamp"`
-
-	Name              string `json:"name"`
-	Title             string `json:"title"`
-	Mimetype          string `json:"mimetype"`
-	ImageExifRotation int    `json:"image_exif_rotation"`
-	Filetype          string `json:"filetype"`
-	PrettyType        string `json:"pretty_type"`
-	User              string `json:"user"`
-
-	Mode         string `json:"mode"`
-	Editable     bool   `json:"editable"`
-	IsExternal   bool   `json:"is_external"`
-	ExternalType string `json:"external_type"`
-
-	Size int `json:"size"`
-
-	URL                string `json:"url"`          // Deprecated - never set
-	URLDownload        string `json:"url_download"` // Deprecated - never set
-	URLPrivate         string `json:"url_private"`
-	URLPrivateDownload string `json:"url_private_download"`
-
-	OriginalH   int    `json:"original_h"`
-	OriginalW   int    `json:"original_w"`
-	Thumb64     string `json:"thumb_64"`
-	Thumb80     string `json:"thumb_80"`
-	Thumb160    string `json:"thumb_160"`
-	Thumb360    string `json:"thumb_360"`
-	Thumb360Gif string `json:"thumb_360_gif"`
-	Thumb360W   int    `json:"thumb_360_w"`
-	Thumb360H   int    `json:"thumb_360_h"`
-	Thumb480    string `json:"thumb_480"`
-	Thumb480W   int    `json:"thumb_480_w"`
-	Thumb480H   int    `json:"thumb_480_h"`
-	Thumb720    string `json:"thumb_720"`
-	Thumb720W   int    `json:"thumb_720_w"`
-	Thumb720H   int    `json:"thumb_720_h"`
-	Thumb960    string `json:"thumb_960"`
-	Thumb960W   int    `json:"thumb_960_w"`
-	Thumb960H   int    `json:"thumb_960_h"`
-	Thumb1024   string `json:"thumb_1024"`
-	Thumb1024W  int    `json:"thumb_1024_w"`
-	Thumb1024H  int    `json:"thumb_1024_h"`
-
-	Permalink       string `json:"permalink"`
-	PermalinkPublic string `json:"permalink_public"`
-
-	EditLink         string `json:"edit_link"`
-	Preview          string `json:"preview"`
-	PreviewHighlight string `json:"preview_highlight"`
-	Lines            int    `json:"lines"`
-	LinesMore        int    `json:"lines_more"`
-
-	IsPublic        bool     `json:"is_public"`
-	PublicURLShared bool     `json:"public_url_shared"`
-	Channels        []string `json:"channels"`
-	Groups          []string `json:"groups"`
-	IMs             []string `json:"ims"`
-	InitialComment  Comment  `json:"initial_comment"`
-	CommentsCount   int      `json:"comments_count"`
-	NumStars        int      `json:"num_stars"`
-	IsStarred       bool     `json:"is_starred"`
-}
-
-// FileUploadParameters contains all the parameters necessary (including the optional ones) for an UploadFile() request.
-//
-// There are three ways to upload a file. You can either set Content if file is small, set Reader if file is large,
-// or provide a local file path in File to upload it from your filesystem.
-type FileUploadParameters struct {
-	File           string
-	Content        string
-	Reader         io.Reader
-	Filetype       string
-	Filename       string
-	Title          string
-	InitialComment string
-	Channels       []string
-}
-
-// GetFilesParameters contains all the parameters necessary (including the optional ones) for a GetFiles() request
-type GetFilesParameters struct {
-	User          string
-	Channel       string
-	TimestampFrom JSONTime
-	TimestampTo   JSONTime
-	Types         string
-	Count         int
-	Page          int
-}
-
-type fileResponseFull struct {
-	File     `json:"file"`
-	Paging   `json:"paging"`
-	Comments []Comment `json:"comments"`
-	Files    []File    `json:"files"`
-
-	SlackResponse
-}
-
-// NewGetFilesParameters provides an instance of GetFilesParameters with all the sane default values set
-func NewGetFilesParameters() GetFilesParameters {
-	return GetFilesParameters{
-		User:          DEFAULT_FILES_USER,
-		Channel:       DEFAULT_FILES_CHANNEL,
-		TimestampFrom: DEFAULT_FILES_TS_FROM,
-		TimestampTo:   DEFAULT_FILES_TS_TO,
-		Types:         DEFAULT_FILES_TYPES,
-		Count:         DEFAULT_FILES_COUNT,
-		Page:          DEFAULT_FILES_PAGE,
-	}
-}
-
-func fileRequest(ctx context.Context, path string, values url.Values, debug bool) (*fileResponseFull, error) {
-	response := &fileResponseFull{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-// GetFileInfo retrieves a file and related comments
-func (api *Client) GetFileInfo(fileID string, count, page int) (*File, []Comment, *Paging, error) {
-	return api.GetFileInfoContext(context.Background(), fileID, count, page)
-}
-
-// GetFileInfoContext retrieves a file and related comments with a custom context
-func (api *Client) GetFileInfoContext(ctx context.Context, fileID string, count, page int) (*File, []Comment, *Paging, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"file":  {fileID},
-		"count": {strconv.Itoa(count)},
-		"page":  {strconv.Itoa(page)},
-	}
-	response, err := fileRequest(ctx, "files.info", values, api.debug)
-	if err != nil {
-		return nil, nil, nil, err
-	}
-	return &response.File, response.Comments, &response.Paging, nil
-}
-
-// GetFiles retrieves all files according to the parameters given
-func (api *Client) GetFiles(params GetFilesParameters) ([]File, *Paging, error) {
-	return api.GetFilesContext(context.Background(), params)
-}
-
-// GetFilesContext retrieves all files according to the parameters given with a custom context
-func (api *Client) GetFilesContext(ctx context.Context, params GetFilesParameters) ([]File, *Paging, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if params.User != DEFAULT_FILES_USER {
-		values.Add("user", params.User)
-	}
-	if params.Channel != DEFAULT_FILES_CHANNEL {
-		values.Add("channel", params.Channel)
-	}
-	if params.TimestampFrom != DEFAULT_FILES_TS_FROM {
-		values.Add("ts_from", strconv.FormatInt(int64(params.TimestampFrom), 10))
-	}
-	if params.TimestampTo != DEFAULT_FILES_TS_TO {
-		values.Add("ts_to", strconv.FormatInt(int64(params.TimestampTo), 10))
-	}
-	if params.Types != DEFAULT_FILES_TYPES {
-		values.Add("types", params.Types)
-	}
-	if params.Count != DEFAULT_FILES_COUNT {
-		values.Add("count", strconv.Itoa(params.Count))
-	}
-	if params.Page != DEFAULT_FILES_PAGE {
-		values.Add("page", strconv.Itoa(params.Page))
-	}
-	response, err := fileRequest(ctx, "files.list", values, api.debug)
-	if err != nil {
-		return nil, nil, err
-	}
-	return response.Files, &response.Paging, nil
-}
-
-// UploadFile uploads a file
-func (api *Client) UploadFile(params FileUploadParameters) (file *File, err error) {
-	return api.UploadFileContext(context.Background(), params)
-}
-
-// UploadFileContext uploads a file and setting a custom context
-func (api *Client) UploadFileContext(ctx context.Context, params FileUploadParameters) (file *File, err error) {
-	// Test if user token is valid. This helps because client.Do doesn't like this for some reason. XXX: More
-	// investigation needed, but for now this will do.
-	_, err = api.AuthTest()
-	if err != nil {
-		return nil, err
-	}
-	response := &fileResponseFull{}
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if params.Filetype != "" {
-		values.Add("filetype", params.Filetype)
-	}
-	if params.Filename != "" {
-		values.Add("filename", params.Filename)
-	}
-	if params.Title != "" {
-		values.Add("title", params.Title)
-	}
-	if params.InitialComment != "" {
-		values.Add("initial_comment", params.InitialComment)
-	}
-	if len(params.Channels) != 0 {
-		values.Add("channels", strings.Join(params.Channels, ","))
-	}
-	if params.Content != "" {
-		values.Add("content", params.Content)
-		err = post(ctx, "files.upload", values, response, api.debug)
-	} else if params.File != "" {
-		err = postLocalWithMultipartResponse(ctx, "files.upload", params.File, "file", values, response, api.debug)
-	} else if params.Reader != nil {
-		err = postWithMultipartResponse(ctx, "files.upload", params.Filename, "file", values, params.Reader, response, api.debug)
-	}
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return &response.File, nil
-}
-
-// DeleteFile deletes a file
-func (api *Client) DeleteFile(fileID string) error {
-	return api.DeleteFileContext(context.Background(), fileID)
-}
-
-// DeleteFileContext deletes a file with a custom context
-func (api *Client) DeleteFileContext(ctx context.Context, fileID string) error {
-	values := url.Values{
-		"token": {api.config.token},
-		"file":  {fileID},
-	}
-	_, err := fileRequest(ctx, "files.delete", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-
-}
-
-// RevokeFilePublicURL disables public/external sharing for a file
-func (api *Client) RevokeFilePublicURL(fileID string) (*File, error) {
-	return api.RevokeFilePublicURLContext(context.Background(), fileID)
-}
-
-// RevokeFilePublicURLContext disables public/external sharing for a file with a custom context
-func (api *Client) RevokeFilePublicURLContext(ctx context.Context, fileID string) (*File, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"file":  {fileID},
-	}
-	response, err := fileRequest(ctx, "files.revokePublicURL", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.File, nil
-}
-
-// ShareFilePublicURL enabled public/external sharing for a file
-func (api *Client) ShareFilePublicURL(fileID string) (*File, []Comment, *Paging, error) {
-	return api.ShareFilePublicURLContext(context.Background(), fileID)
-}
-
-// ShareFilePublicURLContext enabled public/external sharing for a file with a custom context
-func (api *Client) ShareFilePublicURLContext(ctx context.Context, fileID string) (*File, []Comment, *Paging, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"file":  {fileID},
-	}
-	response, err := fileRequest(ctx, "files.sharedPublicURL", values, api.debug)
-	if err != nil {
-		return nil, nil, nil, err
-	}
-	return &response.File, response.Comments, &response.Paging, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/groups.go b/vendor/github.com/matterbridge/slack/groups.go
deleted file mode 100644
index 444666dd..00000000
--- a/vendor/github.com/matterbridge/slack/groups.go
+++ /dev/null
@@ -1,375 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-	"strconv"
-)
-
-// Group contains all the information for a group
-type Group struct {
-	groupConversation
-	IsGroup bool `json:"is_group"`
-}
-
-type groupResponseFull struct {
-	Group          Group   `json:"group"`
-	Groups         []Group `json:"groups"`
-	Purpose        string  `json:"purpose"`
-	Topic          string  `json:"topic"`
-	NotInGroup     bool    `json:"not_in_group"`
-	NoOp           bool    `json:"no_op"`
-	AlreadyClosed  bool    `json:"already_closed"`
-	AlreadyOpen    bool    `json:"already_open"`
-	AlreadyInGroup bool    `json:"already_in_group"`
-	Channel        Channel `json:"channel"`
-	History
-	SlackResponse
-}
-
-func groupRequest(ctx context.Context, path string, values url.Values, debug bool) (*groupResponseFull, error) {
-	response := &groupResponseFull{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-// ArchiveGroup archives a private group
-func (api *Client) ArchiveGroup(group string) error {
-	return api.ArchiveGroupContext(context.Background(), group)
-}
-
-// ArchiveGroup archives a private group
-func (api *Client) ArchiveGroupContext(ctx context.Context, group string) error {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-	}
-	_, err := groupRequest(ctx, "groups.archive", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// UnarchiveGroup unarchives a private group
-func (api *Client) UnarchiveGroup(group string) error {
-	return api.UnarchiveGroupContext(context.Background(), group)
-}
-
-// UnarchiveGroup unarchives a private group
-func (api *Client) UnarchiveGroupContext(ctx context.Context, group string) error {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-	}
-	_, err := groupRequest(ctx, "groups.unarchive", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// CreateGroup creates a private group
-func (api *Client) CreateGroup(group string) (*Group, error) {
-	return api.CreateGroupContext(context.Background(), group)
-}
-
-// CreateGroup creates a private group
-func (api *Client) CreateGroupContext(ctx context.Context, group string) (*Group, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"name":  {group},
-	}
-	response, err := groupRequest(ctx, "groups.create", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Group, nil
-}
-
-// CreateChildGroup creates a new private group archiving the old one
-// This method takes an existing private group and performs the following steps:
-//   1. Renames the existing group (from "example" to "example-archived").
-//   2. Archives the existing group.
-//   3. Creates a new group with the name of the existing group.
-//   4. Adds all members of the existing group to the new group.
-func (api *Client) CreateChildGroup(group string) (*Group, error) {
-	return api.CreateChildGroupContext(context.Background(), group)
-}
-
-// CreateChildGroup creates a new private group archiving the old one with a custom context
-// For more information see CreateChildGroup
-func (api *Client) CreateChildGroupContext(ctx context.Context, group string) (*Group, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-	}
-	response, err := groupRequest(ctx, "groups.createChild", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Group, nil
-}
-
-// CloseGroup closes a private group
-func (api *Client) CloseGroup(group string) (bool, bool, error) {
-	return api.CloseGroupContext(context.Background(), group)
-}
-
-// CloseGroupContext closes a private group with a custom context
-func (api *Client) CloseGroupContext(ctx context.Context, group string) (bool, bool, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-	}
-	response, err := imRequest(ctx, "groups.close", values, api.debug)
-	if err != nil {
-		return false, false, err
-	}
-	return response.NoOp, response.AlreadyClosed, nil
-}
-
-// GetGroupHistory fetches all the history for a private group
-func (api *Client) GetGroupHistory(group string, params HistoryParameters) (*History, error) {
-	return api.GetGroupHistoryContext(context.Background(), group, params)
-}
-
-// GetGroupHistoryContext fetches all the history for a private group with a custom context
-func (api *Client) GetGroupHistoryContext(ctx context.Context, group string, params HistoryParameters) (*History, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-	}
-	if params.Latest != DEFAULT_HISTORY_LATEST {
-		values.Add("latest", params.Latest)
-	}
-	if params.Oldest != DEFAULT_HISTORY_OLDEST {
-		values.Add("oldest", params.Oldest)
-	}
-	if params.Count != DEFAULT_HISTORY_COUNT {
-		values.Add("count", strconv.Itoa(params.Count))
-	}
-	if params.Inclusive != DEFAULT_HISTORY_INCLUSIVE {
-		if params.Inclusive {
-			values.Add("inclusive", "1")
-		} else {
-			values.Add("inclusive", "0")
-		}
-	}
-	if params.Unreads != DEFAULT_HISTORY_UNREADS {
-		if params.Unreads {
-			values.Add("unreads", "1")
-		} else {
-			values.Add("unreads", "0")
-		}
-	}
-	response, err := groupRequest(ctx, "groups.history", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.History, nil
-}
-
-// InviteUserToGroup invites a specific user to a private group
-func (api *Client) InviteUserToGroup(group, user string) (*Group, bool, error) {
-	return api.InviteUserToGroupContext(context.Background(), group, user)
-}
-
-// InviteUserToGroupContext invites a specific user to a private group with a custom context
-func (api *Client) InviteUserToGroupContext(ctx context.Context, group, user string) (*Group, bool, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-		"user":    {user},
-	}
-	response, err := groupRequest(ctx, "groups.invite", values, api.debug)
-	if err != nil {
-		return nil, false, err
-	}
-	return &response.Group, response.AlreadyInGroup, nil
-}
-
-// LeaveGroup makes authenticated user leave the group
-func (api *Client) LeaveGroup(group string) error {
-	return api.LeaveGroupContext(context.Background(), group)
-}
-
-// LeaveGroupContext makes authenticated user leave the group with a custom context
-func (api *Client) LeaveGroupContext(ctx context.Context, group string) error {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-	}
-	_, err := groupRequest(ctx, "groups.leave", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// KickUserFromGroup kicks a user from a group
-func (api *Client) KickUserFromGroup(group, user string) error {
-	return api.KickUserFromGroupContext(context.Background(), group, user)
-}
-
-// KickUserFromGroupContext kicks a user from a group with a custom context
-func (api *Client) KickUserFromGroupContext(ctx context.Context, group, user string) error {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-		"user":    {user},
-	}
-	_, err := groupRequest(ctx, "groups.kick", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// GetGroups retrieves all groups
-func (api *Client) GetGroups(excludeArchived bool) ([]Group, error) {
-	return api.GetGroupsContext(context.Background(), excludeArchived)
-}
-
-// GetGroupsContext retrieves all groups with a custom context
-func (api *Client) GetGroupsContext(ctx context.Context, excludeArchived bool) ([]Group, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if excludeArchived {
-		values.Add("exclude_archived", "1")
-	}
-	response, err := groupRequest(ctx, "groups.list", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return response.Groups, nil
-}
-
-// GetGroupInfo retrieves the given group
-func (api *Client) GetGroupInfo(group string) (*Group, error) {
-	return api.GetGroupInfoContext(context.Background(), group)
-}
-
-// GetGroupInfoContext retrieves the given group with a custom context
-func (api *Client) GetGroupInfoContext(ctx context.Context, group string) (*Group, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-	}
-	response, err := groupRequest(ctx, "groups.info", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Group, nil
-}
-
-// SetGroupReadMark sets the read mark on a private group
-// Clients should try to avoid making this call too often. When needing to mark a read position, a client should set a
-// timer before making the call. In this way, any further updates needed during the timeout will not generate extra
-// calls (just one per channel). This is useful for when reading scroll-back history, or following a busy live
-// channel. A timeout of 5 seconds is a good starting point. Be sure to flush these calls on shutdown/logout.
-func (api *Client) SetGroupReadMark(group, ts string) error {
-	return api.SetGroupReadMarkContext(context.Background(), group, ts)
-}
-
-// SetGroupReadMarkContext sets the read mark on a private group with a custom context
-// For more details see SetGroupReadMark
-func (api *Client) SetGroupReadMarkContext(ctx context.Context, group, ts string) error {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-		"ts":      {ts},
-	}
-	_, err := groupRequest(ctx, "groups.mark", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// OpenGroup opens a private group
-func (api *Client) OpenGroup(group string) (bool, bool, error) {
-	return api.OpenGroupContext(context.Background(), group)
-}
-
-// OpenGroupContext opens a private group with a custom context
-func (api *Client) OpenGroupContext(ctx context.Context, group string) (bool, bool, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-	}
-	response, err := groupRequest(ctx, "groups.open", values, api.debug)
-	if err != nil {
-		return false, false, err
-	}
-	return response.NoOp, response.AlreadyOpen, nil
-}
-
-// RenameGroup renames a group
-// XXX: They return a channel, not a group. What is this crap? :(
-// Inconsistent api it seems.
-func (api *Client) RenameGroup(group, name string) (*Channel, error) {
-	return api.RenameGroupContext(context.Background(), group, name)
-}
-
-// RenameGroupContext renames a group with a custom context
-func (api *Client) RenameGroupContext(ctx context.Context, group, name string) (*Channel, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-		"name":    {name},
-	}
-	// XXX: the created entry in this call returns a string instead of a number
-	// so I may have to do some workaround to solve it.
-	response, err := groupRequest(ctx, "groups.rename", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Channel, nil
-}
-
-// SetGroupPurpose sets the group purpose
-func (api *Client) SetGroupPurpose(group, purpose string) (string, error) {
-	return api.SetGroupPurposeContext(context.Background(), group, purpose)
-}
-
-// SetGroupPurposeContext sets the group purpose with a custom context
-func (api *Client) SetGroupPurposeContext(ctx context.Context, group, purpose string) (string, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-		"purpose": {purpose},
-	}
-	response, err := groupRequest(ctx, "groups.setPurpose", values, api.debug)
-	if err != nil {
-		return "", err
-	}
-	return response.Purpose, nil
-}
-
-// SetGroupTopic sets the group topic
-func (api *Client) SetGroupTopic(group, topic string) (string, error) {
-	return api.SetGroupTopicContext(context.Background(), group, topic)
-}
-
-// SetGroupTopicContext sets the group topic with a custom context
-func (api *Client) SetGroupTopicContext(ctx context.Context, group, topic string) (string, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {group},
-		"topic":   {topic},
-	}
-	response, err := groupRequest(ctx, "groups.setTopic", values, api.debug)
-	if err != nil {
-		return "", err
-	}
-	return response.Topic, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/history.go b/vendor/github.com/matterbridge/slack/history.go
deleted file mode 100644
index 87b2e1ed..00000000
--- a/vendor/github.com/matterbridge/slack/history.go
+++ /dev/null
@@ -1,36 +0,0 @@
-package slack
-
-const (
-	DEFAULT_HISTORY_LATEST    = ""
-	DEFAULT_HISTORY_OLDEST    = "0"
-	DEFAULT_HISTORY_COUNT     = 100
-	DEFAULT_HISTORY_INCLUSIVE = false
-	DEFAULT_HISTORY_UNREADS   = false
-)
-
-// HistoryParameters contains all the necessary information to help in the retrieval of history for Channels/Groups/DMs
-type HistoryParameters struct {
-	Latest    string
-	Oldest    string
-	Count     int
-	Inclusive bool
-	Unreads   bool
-}
-
-// History contains message history information needed to navigate a Channel / Group / DM history
-type History struct {
-	Latest   string    `json:"latest"`
-	Messages []Message `json:"messages"`
-	HasMore  bool      `json:"has_more"`
-}
-
-// NewHistoryParameters provides an instance of HistoryParameters with all the sane default values set
-func NewHistoryParameters() HistoryParameters {
-	return HistoryParameters{
-		Latest:    DEFAULT_HISTORY_LATEST,
-		Oldest:    DEFAULT_HISTORY_OLDEST,
-		Count:     DEFAULT_HISTORY_COUNT,
-		Inclusive: DEFAULT_HISTORY_INCLUSIVE,
-		Unreads:   DEFAULT_HISTORY_UNREADS,
-	}
-}
diff --git a/vendor/github.com/matterbridge/slack/im.go b/vendor/github.com/matterbridge/slack/im.go
deleted file mode 100644
index 0cbc8d34..00000000
--- a/vendor/github.com/matterbridge/slack/im.go
+++ /dev/null
@@ -1,157 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-	"strconv"
-)
-
-type imChannel struct {
-	ID string `json:"id"`
-}
-
-type imResponseFull struct {
-	NoOp          bool      `json:"no_op"`
-	AlreadyClosed bool      `json:"already_closed"`
-	AlreadyOpen   bool      `json:"already_open"`
-	Channel       imChannel `json:"channel"`
-	IMs           []IM      `json:"ims"`
-	History
-	SlackResponse
-}
-
-// IM contains information related to the Direct Message channel
-type IM struct {
-	conversation
-	IsIM          bool   `json:"is_im"`
-	User          string `json:"user"`
-	IsUserDeleted bool   `json:"is_user_deleted"`
-}
-
-func imRequest(ctx context.Context, path string, values url.Values, debug bool) (*imResponseFull, error) {
-	response := &imResponseFull{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-// CloseIMChannel closes the direct message channel
-func (api *Client) CloseIMChannel(channel string) (bool, bool, error) {
-	return api.CloseIMChannelContext(context.Background(), channel)
-}
-
-// CloseIMChannelContext closes the direct message channel with a custom context
-func (api *Client) CloseIMChannelContext(ctx context.Context, channel string) (bool, bool, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-	}
-	response, err := imRequest(ctx, "im.close", values, api.debug)
-	if err != nil {
-		return false, false, err
-	}
-	return response.NoOp, response.AlreadyClosed, nil
-}
-
-// OpenIMChannel opens a direct message channel to the user provided as argument
-// Returns some status and the channel ID
-func (api *Client) OpenIMChannel(user string) (bool, bool, string, error) {
-	return api.OpenIMChannelContext(context.Background(), user)
-}
-
-// OpenIMChannelContext opens a direct message channel to the user provided as argument with a custom context
-// Returns some status and the channel ID
-func (api *Client) OpenIMChannelContext(ctx context.Context, user string) (bool, bool, string, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"user":  {user},
-	}
-	response, err := imRequest(ctx, "im.open", values, api.debug)
-	if err != nil {
-		return false, false, "", err
-	}
-	return response.NoOp, response.AlreadyOpen, response.Channel.ID, nil
-}
-
-// MarkIMChannel sets the read mark of a direct message channel to a specific point
-func (api *Client) MarkIMChannel(channel, ts string) (err error) {
-	return api.MarkIMChannelContext(context.Background(), channel, ts)
-}
-
-// MarkIMChannelContext sets the read mark of a direct message channel to a specific point with a custom context
-func (api *Client) MarkIMChannelContext(ctx context.Context, channel, ts string) (err error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-		"ts":      {ts},
-	}
-	_, err = imRequest(ctx, "im.mark", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return
-}
-
-// GetIMHistory retrieves the direct message channel history
-func (api *Client) GetIMHistory(channel string, params HistoryParameters) (*History, error) {
-	return api.GetIMHistoryContext(context.Background(), channel, params)
-}
-
-// GetIMHistoryContext retrieves the direct message channel history with a custom context
-func (api *Client) GetIMHistoryContext(ctx context.Context, channel string, params HistoryParameters) (*History, error) {
-	values := url.Values{
-		"token":   {api.config.token},
-		"channel": {channel},
-	}
-	if params.Latest != DEFAULT_HISTORY_LATEST {
-		values.Add("latest", params.Latest)
-	}
-	if params.Oldest != DEFAULT_HISTORY_OLDEST {
-		values.Add("oldest", params.Oldest)
-	}
-	if params.Count != DEFAULT_HISTORY_COUNT {
-		values.Add("count", strconv.Itoa(params.Count))
-	}
-	if params.Inclusive != DEFAULT_HISTORY_INCLUSIVE {
-		if params.Inclusive {
-			values.Add("inclusive", "1")
-		} else {
-			values.Add("inclusive", "0")
-		}
-	}
-	if params.Unreads != DEFAULT_HISTORY_UNREADS {
-		if params.Unreads {
-			values.Add("unreads", "1")
-		} else {
-			values.Add("unreads", "0")
-		}
-	}
-	response, err := imRequest(ctx, "im.history", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.History, nil
-}
-
-// GetIMChannels returns the list of direct message channels
-func (api *Client) GetIMChannels() ([]IM, error) {
-	return api.GetIMChannelsContext(context.Background())
-}
-
-// GetIMChannelsContext returns the list of direct message channels with a custom context
-func (api *Client) GetIMChannelsContext(ctx context.Context) ([]IM, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	response, err := imRequest(ctx, "im.list", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return response.IMs, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/info.go b/vendor/github.com/matterbridge/slack/info.go
deleted file mode 100644
index 49db5327..00000000
--- a/vendor/github.com/matterbridge/slack/info.go
+++ /dev/null
@@ -1,210 +0,0 @@
-package slack
-
-import (
-	"fmt"
-	"time"
-)
-
-// UserPrefs needs to be implemented
-type UserPrefs struct {
-	// "highlight_words":"",
-	// "user_colors":"",
-	// "color_names_in_list":true,
-	// "growls_enabled":true,
-	// "tz":"Europe\/London",
-	// "push_dm_alert":true,
-	// "push_mention_alert":true,
-	// "push_everything":true,
-	// "push_idle_wait":2,
-	// "push_sound":"b2.mp3",
-	// "push_loud_channels":"",
-	// "push_mention_channels":"",
-	// "push_loud_channels_set":"",
-	// "email_alerts":"instant",
-	// "email_alerts_sleep_until":0,
-	// "email_misc":false,
-	// "email_weekly":true,
-	// "welcome_message_hidden":false,
-	// "all_channels_loud":true,
-	// "loud_channels":"",
-	// "never_channels":"",
-	// "loud_channels_set":"",
-	// "show_member_presence":true,
-	// "search_sort":"timestamp",
-	// "expand_inline_imgs":true,
-	// "expand_internal_inline_imgs":true,
-	// "expand_snippets":false,
-	// "posts_formatting_guide":true,
-	// "seen_welcome_2":true,
-	// "seen_ssb_prompt":false,
-	// "search_only_my_channels":false,
-	// "emoji_mode":"default",
-	// "has_invited":true,
-	// "has_uploaded":false,
-	// "has_created_channel":true,
-	// "search_exclude_channels":"",
-	// "messages_theme":"default",
-	// "webapp_spellcheck":true,
-	// "no_joined_overlays":false,
-	// "no_created_overlays":true,
-	// "dropbox_enabled":false,
-	// "seen_user_menu_tip_card":true,
-	// "seen_team_menu_tip_card":true,
-	// "seen_channel_menu_tip_card":true,
-	// "seen_message_input_tip_card":true,
-	// "seen_channels_tip_card":true,
-	// "seen_domain_invite_reminder":false,
-	// "seen_member_invite_reminder":false,
-	// "seen_flexpane_tip_card":true,
-	// "seen_search_input_tip_card":true,
-	// "mute_sounds":false,
-	// "arrow_history":false,
-	// "tab_ui_return_selects":true,
-	// "obey_inline_img_limit":true,
-	// "new_msg_snd":"knock_brush.mp3",
-	// "collapsible":false,
-	// "collapsible_by_click":true,
-	// "require_at":false,
-	// "mac_ssb_bounce":"",
-	// "mac_ssb_bullet":true,
-	// "win_ssb_bullet":true,
-	// "expand_non_media_attachments":true,
-	// "show_typing":true,
-	// "pagekeys_handled":true,
-	// "last_snippet_type":"",
-	// "display_real_names_override":0,
-	// "time24":false,
-	// "enter_is_special_in_tbt":false,
-	// "graphic_emoticons":false,
-	// "convert_emoticons":true,
-	// "autoplay_chat_sounds":true,
-	// "ss_emojis":true,
-	// "sidebar_behavior":"",
-	// "mark_msgs_read_immediately":true,
-	// "start_scroll_at_oldest":true,
-	// "snippet_editor_wrap_long_lines":false,
-	// "ls_disabled":false,
-	// "sidebar_theme":"default",
-	// "sidebar_theme_custom_values":"",
-	// "f_key_search":false,
-	// "k_key_omnibox":true,
-	// "speak_growls":false,
-	// "mac_speak_voice":"com.apple.speech.synthesis.voice.Alex",
-	// "mac_speak_speed":250,
-	// "comma_key_prefs":false,
-	// "at_channel_suppressed_channels":"",
-	// "push_at_channel_suppressed_channels":"",
-	// "prompted_for_email_disabling":false,
-	// "full_text_extracts":false,
-	// "no_text_in_notifications":false,
-	// "muted_channels":"",
-	// "no_macssb1_banner":false,
-	// "privacy_policy_seen":true,
-	// "search_exclude_bots":false,
-	// "fuzzy_matching":false
-}
-
-// UserDetails contains user details coming in the initial response from StartRTM
-type UserDetails struct {
-	ID             string    `json:"id"`
-	Name           string    `json:"name"`
-	Created        JSONTime  `json:"created"`
-	ManualPresence string    `json:"manual_presence"`
-	Prefs          UserPrefs `json:"prefs"`
-}
-
-// JSONTime exists so that we can have a String method converting the date
-type JSONTime int64
-
-// String converts the unix timestamp into a string
-func (t JSONTime) String() string {
-	tm := t.Time()
-	return fmt.Sprintf("\"%s\"", tm.Format("Mon Jan _2"))
-}
-
-// Time returns a `time.Time` representation of this value.
-func (t JSONTime) Time() time.Time {
-	return time.Unix(int64(t), 0)
-}
-
-// Team contains details about a team
-type Team struct {
-	ID     string `json:"id"`
-	Name   string `json:"name"`
-	Domain string `json:"domain"`
-}
-
-// Icons XXX: needs further investigation
-type Icons struct {
-	Image36 string `json:"image_36,omitempty"`
-	Image48 string `json:"image_48,omitempty"`
-	Image72 string `json:"image_72,omitempty"`
-}
-
-// Info contains various details about Users, Channels, Bots and the authenticated user.
-// It is returned by StartRTM or included in the "ConnectedEvent" RTM event.
-type Info struct {
-	URL      string       `json:"url,omitempty"`
-	User     *UserDetails `json:"self,omitempty"`
-	Team     *Team        `json:"team,omitempty"`
-	Users    []User       `json:"users,omitempty"`
-	Channels []Channel    `json:"channels,omitempty"`
-	Groups   []Group      `json:"groups,omitempty"`
-	Bots     []Bot        `json:"bots,omitempty"`
-	IMs      []IM         `json:"ims,omitempty"`
-}
-
-type infoResponseFull struct {
-	Info
-	WebResponse
-}
-
-// GetBotByID returns a bot given a bot id
-func (info Info) GetBotByID(botID string) *Bot {
-	for _, bot := range info.Bots {
-		if bot.ID == botID {
-			return &bot
-		}
-	}
-	return nil
-}
-
-// GetUserByID returns a user given a user id
-func (info Info) GetUserByID(userID string) *User {
-	for _, user := range info.Users {
-		if user.ID == userID {
-			return &user
-		}
-	}
-	return nil
-}
-
-// GetChannelByID returns a channel given a channel id
-func (info Info) GetChannelByID(channelID string) *Channel {
-	for _, channel := range info.Channels {
-		if channel.ID == channelID {
-			return &channel
-		}
-	}
-	return nil
-}
-
-// GetGroupByID returns a group given a group id
-func (info Info) GetGroupByID(groupID string) *Group {
-	for _, group := range info.Groups {
-		if group.ID == groupID {
-			return &group
-		}
-	}
-	return nil
-}
-
-// GetIMByID returns an IM given an IM id
-func (info Info) GetIMByID(imID string) *IM {
-	for _, im := range info.IMs {
-		if im.ID == imID {
-			return &im
-		}
-	}
-	return nil
-}
diff --git a/vendor/github.com/matterbridge/slack/item.go b/vendor/github.com/matterbridge/slack/item.go
deleted file mode 100644
index 89af4eb1..00000000
--- a/vendor/github.com/matterbridge/slack/item.go
+++ /dev/null
@@ -1,75 +0,0 @@
-package slack
-
-const (
-	TYPE_MESSAGE      = "message"
-	TYPE_FILE         = "file"
-	TYPE_FILE_COMMENT = "file_comment"
-	TYPE_CHANNEL      = "channel"
-	TYPE_IM           = "im"
-	TYPE_GROUP        = "group"
-)
-
-// Item is any type of slack message - message, file, or file comment.
-type Item struct {
-	Type      string   `json:"type"`
-	Channel   string   `json:"channel,omitempty"`
-	Message   *Message `json:"message,omitempty"`
-	File      *File    `json:"file,omitempty"`
-	Comment   *Comment `json:"comment,omitempty"`
-	Timestamp string   `json:"ts,omitempty"`
-}
-
-// NewMessageItem turns a message on a channel into a typed message struct.
-func NewMessageItem(ch string, m *Message) Item {
-	return Item{Type: TYPE_MESSAGE, Channel: ch, Message: m}
-}
-
-// NewFileItem turns a file into a typed file struct.
-func NewFileItem(f *File) Item {
-	return Item{Type: TYPE_FILE, File: f}
-}
-
-// NewFileCommentItem turns a file and comment into a typed file_comment struct.
-func NewFileCommentItem(f *File, c *Comment) Item {
-	return Item{Type: TYPE_FILE_COMMENT, File: f, Comment: c}
-}
-
-// NewChannelItem turns a channel id into a typed channel struct.
-func NewChannelItem(ch string) Item {
-	return Item{Type: TYPE_CHANNEL, Channel: ch}
-}
-
-// NewIMItem turns a channel id into a typed im struct.
-func NewIMItem(ch string) Item {
-	return Item{Type: TYPE_IM, Channel: ch}
-}
-
-// NewGroupItem turns a channel id into a typed group struct.
-func NewGroupItem(ch string) Item {
-	return Item{Type: TYPE_GROUP, Channel: ch}
-}
-
-// ItemRef is a reference to a message of any type. One of FileID,
-// CommentId, or the combination of ChannelId and Timestamp must be
-// specified.
-type ItemRef struct {
-	Channel   string `json:"channel"`
-	Timestamp string `json:"timestamp"`
-	File      string `json:"file"`
-	Comment   string `json:"file_comment"`
-}
-
-// NewRefToMessage initializes a reference to to a message.
-func NewRefToMessage(channel, timestamp string) ItemRef {
-	return ItemRef{Channel: channel, Timestamp: timestamp}
-}
-
-// NewRefToFile initializes a reference to a file.
-func NewRefToFile(file string) ItemRef {
-	return ItemRef{File: file}
-}
-
-// NewRefToComment initializes a reference to a file comment.
-func NewRefToComment(comment string) ItemRef {
-	return ItemRef{Comment: comment}
-}
diff --git a/vendor/github.com/matterbridge/slack/messageID.go b/vendor/github.com/matterbridge/slack/messageID.go
deleted file mode 100644
index a17472b4..00000000
--- a/vendor/github.com/matterbridge/slack/messageID.go
+++ /dev/null
@@ -1,30 +0,0 @@
-package slack
-
-import "sync"
-
-// IDGenerator provides an interface for generating integer ID values.
-type IDGenerator interface {
-	Next() int
-}
-
-// NewSafeID returns a new instance of an IDGenerator which is safe for
-// concurrent use by multiple goroutines.
-func NewSafeID(startID int) IDGenerator {
-	return &safeID{
-		nextID: startID,
-		mutex:  &sync.Mutex{},
-	}
-}
-
-type safeID struct {
-	nextID int
-	mutex  *sync.Mutex
-}
-
-func (s *safeID) Next() int {
-	s.mutex.Lock()
-	defer s.mutex.Unlock()
-	id := s.nextID
-	s.nextID++
-	return id
-}
diff --git a/vendor/github.com/matterbridge/slack/messages.go b/vendor/github.com/matterbridge/slack/messages.go
deleted file mode 100644
index 39f0d6b1..00000000
--- a/vendor/github.com/matterbridge/slack/messages.go
+++ /dev/null
@@ -1,144 +0,0 @@
-package slack
-
-// OutgoingMessage is used for the realtime API, and seems incomplete.
-type OutgoingMessage struct {
-	ID              int    `json:"id"`
-	Channel         string `json:"channel,omitempty"`
-	Text            string `json:"text,omitempty"`
-	Type            string `json:"type,omitempty"`
-	ThreadTimestamp string `json:"thread_ts,omitempty"`
-}
-
-// Message is an auxiliary type to allow us to have a message containing sub messages
-type Message struct {
-	Msg
-	SubMessage *Msg `json:"message,omitempty"`
-}
-
-// Msg contains information about a slack message
-type Msg struct {
-	// Basic Message
-	Type            string       `json:"type,omitempty"`
-	Channel         string       `json:"channel,omitempty"`
-	User            string       `json:"user,omitempty"`
-	Text            string       `json:"text,omitempty"`
-	Timestamp       string       `json:"ts,omitempty"`
-	ThreadTimestamp string       `json:"thread_ts,omitempty"`
-	IsStarred       bool         `json:"is_starred,omitempty"`
-	PinnedTo        []string     `json:"pinned_to, omitempty"`
-	Attachments     []Attachment `json:"attachments,omitempty"`
-	Edited          *Edited      `json:"edited,omitempty"`
-
-	// Message Subtypes
-	SubType string `json:"subtype,omitempty"`
-
-	// Hidden Subtypes
-	Hidden           bool   `json:"hidden,omitempty"`     // message_changed, message_deleted, unpinned_item
-	DeletedTimestamp string `json:"deleted_ts,omitempty"` // message_deleted
-	EventTimestamp   string `json:"event_ts,omitempty"`
-
-	// bot_message (https://api.slack.com/events/message/bot_message)
-	BotID    string `json:"bot_id,omitempty"`
-	Username string `json:"username,omitempty"`
-	Icons    *Icon  `json:"icons,omitempty"`
-
-	// channel_join, group_join
-	Inviter string `json:"inviter,omitempty"`
-
-	// channel_topic, group_topic
-	Topic string `json:"topic,omitempty"`
-
-	// channel_purpose, group_purpose
-	Purpose string `json:"purpose,omitempty"`
-
-	// channel_name, group_name
-	Name    string `json:"name,omitempty"`
-	OldName string `json:"old_name,omitempty"`
-
-	// channel_archive, group_archive
-	Members []string `json:"members,omitempty"`
-
-	// channels.replies, groups.replies, im.replies, mpim.replies
-	ReplyCount   int     `json:"reply_count,omitempty"`
-	Replies      []Reply `json:"replies,omitempty"`
-	ParentUserId string  `json:"parent_user_id,omitempty"`
-
-	// file_share, file_comment, file_mention
-	File *File `json:"file,omitempty"`
-
-	// file_share
-	Upload bool `json:"upload,omitempty"`
-
-	// file_comment
-	Comment *Comment `json:"comment,omitempty"`
-
-	// pinned_item
-	ItemType string `json:"item_type,omitempty"`
-
-	// https://api.slack.com/rtm
-	ReplyTo int    `json:"reply_to,omitempty"`
-	Team    string `json:"team,omitempty"`
-
-	// reactions
-	Reactions []ItemReaction `json:"reactions,omitempty"`
-}
-
-// Icon is used for bot messages
-type Icon struct {
-	IconURL   string `json:"icon_url,omitempty"`
-	IconEmoji string `json:"icon_emoji,omitempty"`
-}
-
-// Edited indicates that a message has been edited.
-type Edited struct {
-	User      string `json:"user,omitempty"`
-	Timestamp string `json:"ts,omitempty"`
-}
-
-// Reply contains information about a reply for a thread
-type Reply struct {
-	User      string `json:"user,omitempty"`
-	Timestamp string `json:"ts,omitempty"`
-}
-
-// Event contains the event type
-type Event struct {
-	Type string `json:"type,omitempty"`
-}
-
-// Ping contains information about a Ping Event
-type Ping struct {
-	ID   int    `json:"id"`
-	Type string `json:"type"`
-}
-
-// Pong contains information about a Pong Event
-type Pong struct {
-	Type    string `json:"type"`
-	ReplyTo int    `json:"reply_to"`
-}
-
-// NewOutgoingMessage prepares an OutgoingMessage that the user can
-// use to send a message. Use this function to properly set the
-// messageID.
-func (rtm *RTM) NewOutgoingMessage(text string, channel string) *OutgoingMessage {
-	id := rtm.idGen.Next()
-	return &OutgoingMessage{
-		ID:      id,
-		Type:    "message",
-		Channel: channel,
-		Text:    text,
-	}
-}
-
-// NewTypingMessage prepares an OutgoingMessage that the user can
-// use to send as a typing indicator. Use this function to properly set the
-// messageID.
-func (rtm *RTM) NewTypingMessage(channel string) *OutgoingMessage {
-	id := rtm.idGen.Next()
-	return &OutgoingMessage{
-		ID:      id,
-		Type:    "typing",
-		Channel: channel,
-	}
-}
diff --git a/vendor/github.com/matterbridge/slack/misc.go b/vendor/github.com/matterbridge/slack/misc.go
deleted file mode 100644
index 3a9ed2d6..00000000
--- a/vendor/github.com/matterbridge/slack/misc.go
+++ /dev/null
@@ -1,183 +0,0 @@
-package slack
-
-import (
-	"bytes"
-	"context"
-	"encoding/json"
-	"fmt"
-	"io"
-	"io/ioutil"
-	"mime/multipart"
-	"net/http"
-	"net/http/httputil"
-	"net/url"
-	"os"
-	"path/filepath"
-	"strings"
-	"time"
-)
-
-// HTTPRequester defines the minimal interface needed for an http.Client to be implemented.
-//
-// Use it in conjunction with the SetHTTPClient function to allow for other capabilities
-// like a tracing http.Client
-type HTTPRequester interface {
-	Do(*http.Request) (*http.Response, error)
-}
-
-var customHTTPClient HTTPRequester
-
-// HTTPClient sets a custom http.Client
-// deprecated: in favor of SetHTTPClient()
-var HTTPClient = &http.Client{}
-
-type WebResponse struct {
-	Ok    bool      `json:"ok"`
-	Error *WebError `json:"error"`
-}
-
-type WebError string
-
-func (s WebError) Error() string {
-	return string(s)
-}
-
-func fileUploadReq(ctx context.Context, path, fieldname, filename string, values url.Values, r io.Reader) (*http.Request, error) {
-	body := &bytes.Buffer{}
-	wr := multipart.NewWriter(body)
-
-	ioWriter, err := wr.CreateFormFile(fieldname, filename)
-	if err != nil {
-		wr.Close()
-		return nil, err
-	}
-	_, err = io.Copy(ioWriter, r)
-	if err != nil {
-		wr.Close()
-		return nil, err
-	}
-	// Close the multipart writer or the footer won't be written
-	wr.Close()
-	req, err := http.NewRequest("POST", path, body)
-	req = req.WithContext(ctx)
-	if err != nil {
-		return nil, err
-	}
-	req.Header.Add("Content-Type", wr.FormDataContentType())
-	req.URL.RawQuery = (values).Encode()
-	return req, nil
-}
-
-func parseResponseBody(body io.ReadCloser, intf *interface{}, debug bool) error {
-	response, err := ioutil.ReadAll(body)
-	if err != nil {
-		return err
-	}
-
-	// FIXME: will be api.Debugf
-	if debug {
-		logger.Printf("parseResponseBody: %s\n", string(response))
-	}
-
-	err = json.Unmarshal(response, &intf)
-	if err != nil {
-		return err
-	}
-
-	return nil
-}
-
-func postLocalWithMultipartResponse(ctx context.Context, path, fpath, fieldname string, values url.Values, intf interface{}, debug bool) error {
-	fullpath, err := filepath.Abs(fpath)
-	if err != nil {
-		return err
-	}
-	file, err := os.Open(fullpath)
-	if err != nil {
-		return err
-	}
-	defer file.Close()
-	return postWithMultipartResponse(ctx, path, filepath.Base(fpath), fieldname, values, file, intf, debug)
-}
-
-func postWithMultipartResponse(ctx context.Context, path, name, fieldname string, values url.Values, r io.Reader, intf interface{}, debug bool) error {
-	req, err := fileUploadReq(ctx, SLACK_API+path, fieldname, name, values, r)
-	if err != nil {
-		return err
-	}
-	req = req.WithContext(ctx)
-	resp, err := getHTTPClient().Do(req)
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
-
-	// Slack seems to send an HTML body along with 5xx error codes. Don't parse it.
-	if resp.StatusCode != 200 {
-		logResponse(resp, debug)
-		return fmt.Errorf("Slack server error: %s.", resp.Status)
-	}
-
-	return parseResponseBody(resp.Body, &intf, debug)
-}
-
-func postForm(ctx context.Context, endpoint string, values url.Values, intf interface{}, debug bool) error {
-	reqBody := strings.NewReader(values.Encode())
-	req, err := http.NewRequest("POST", endpoint, reqBody)
-	if err != nil {
-		return err
-	}
-	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
-
-	req = req.WithContext(ctx)
-	resp, err := getHTTPClient().Do(req)
-	if err != nil {
-		return err
-	}
-	defer resp.Body.Close()
-
-	// Slack seems to send an HTML body along with 5xx error codes. Don't parse it.
-	if resp.StatusCode != 200 {
-		logResponse(resp, debug)
-		return fmt.Errorf("Slack server error: %s.", resp.Status)
-	}
-
-	return parseResponseBody(resp.Body, &intf, debug)
-}
-
-func post(ctx context.Context, path string, values url.Values, intf interface{}, debug bool) error {
-	return postForm(ctx, SLACK_API+path, values, intf, debug)
-}
-
-func parseAdminResponse(ctx context.Context, method string, teamName string, values url.Values, intf interface{}, debug bool) error {
-	endpoint := fmt.Sprintf(SLACK_WEB_API_FORMAT, teamName, method, time.Now().Unix())
-	return postForm(ctx, endpoint, values, intf, debug)
-}
-
-func logResponse(resp *http.Response, debug bool) error {
-	if debug {
-		text, err := httputil.DumpResponse(resp, true)
-		if err != nil {
-			return err
-		}
-
-		logger.Print(string(text))
-	}
-
-	return nil
-}
-
-func getHTTPClient() HTTPRequester {
-	if customHTTPClient != nil {
-		return customHTTPClient
-	}
-
-	return HTTPClient
-}
-
-// SetHTTPClient allows you to specify a custom http.Client
-// Use this instead of the package level HTTPClient variable if you want to use a custom client like the
-// Stackdriver Trace HTTPClient https://godoc.org/cloud.google.com/go/trace#HTTPClient
-func SetHTTPClient(client HTTPRequester) {
-	customHTTPClient = client
-}
diff --git a/vendor/github.com/matterbridge/slack/oauth.go b/vendor/github.com/matterbridge/slack/oauth.go
deleted file mode 100644
index db10aa1b..00000000
--- a/vendor/github.com/matterbridge/slack/oauth.go
+++ /dev/null
@@ -1,66 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-)
-
-type OAuthResponseIncomingWebhook struct {
-	URL              string `json:"url"`
-	Channel          string `json:"channel"`
-	ChannelID        string `json:"channel_id,omitempty"`
-	ConfigurationURL string `json:"configuration_url"`
-}
-
-type OAuthResponseBot struct {
-	BotUserID      string `json:"bot_user_id"`
-	BotAccessToken string `json:"bot_access_token"`
-}
-
-type OAuthResponse struct {
-	AccessToken     string                       `json:"access_token"`
-	Scope           string                       `json:"scope"`
-	TeamName        string                       `json:"team_name"`
-	TeamID          string                       `json:"team_id"`
-	IncomingWebhook OAuthResponseIncomingWebhook `json:"incoming_webhook"`
-	Bot             OAuthResponseBot             `json:"bot"`
-	UserID          string                       `json:"user_id,omitempty"`
-	SlackResponse
-}
-
-// GetOAuthToken retrieves an AccessToken
-func GetOAuthToken(clientID, clientSecret, code, redirectURI string, debug bool) (accessToken string, scope string, err error) {
-	return GetOAuthTokenContext(context.Background(), clientID, clientSecret, code, redirectURI, debug)
-}
-
-// GetOAuthTokenContext retrieves an AccessToken with a custom context
-func GetOAuthTokenContext(ctx context.Context, clientID, clientSecret, code, redirectURI string, debug bool) (accessToken string, scope string, err error) {
-	response, err := GetOAuthResponseContext(ctx, clientID, clientSecret, code, redirectURI, debug)
-	if err != nil {
-		return "", "", err
-	}
-	return response.AccessToken, response.Scope, nil
-}
-
-func GetOAuthResponse(clientID, clientSecret, code, redirectURI string, debug bool) (resp *OAuthResponse, err error) {
-	return GetOAuthResponseContext(context.Background(), clientID, clientSecret, code, redirectURI, debug)
-}
-
-func GetOAuthResponseContext(ctx context.Context, clientID, clientSecret, code, redirectURI string, debug bool) (resp *OAuthResponse, err error) {
-	values := url.Values{
-		"client_id":     {clientID},
-		"client_secret": {clientSecret},
-		"code":          {code},
-		"redirect_uri":  {redirectURI},
-	}
-	response := &OAuthResponse{}
-	err = post(ctx, "oauth.access", values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/pagination.go b/vendor/github.com/matterbridge/slack/pagination.go
deleted file mode 100644
index 87dd136a..00000000
--- a/vendor/github.com/matterbridge/slack/pagination.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package slack
-
-// Paging contains paging information
-type Paging struct {
-	Count int `json:"count"`
-	Total int `json:"total"`
-	Page  int `json:"page"`
-	Pages int `json:"pages"`
-}
-
-// Pagination contains pagination information
-// This is different from Paging in that it contains additional details
-type Pagination struct {
-	TotalCount int `json:"total_count"`
-	Page       int `json:"page"`
-	PerPage    int `json:"per_page"`
-	PageCount  int `json:"page_count"`
-	First      int `json:"first"`
-	Last       int `json:"last"`
-}
diff --git a/vendor/github.com/matterbridge/slack/pins.go b/vendor/github.com/matterbridge/slack/pins.go
deleted file mode 100644
index a20f8f73..00000000
--- a/vendor/github.com/matterbridge/slack/pins.go
+++ /dev/null
@@ -1,95 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-)
-
-type listPinsResponseFull struct {
-	Items  []Item
-	Paging `json:"paging"`
-	SlackResponse
-}
-
-// AddPin pins an item in a channel
-func (api *Client) AddPin(channel string, item ItemRef) error {
-	return api.AddPinContext(context.Background(), channel, item)
-}
-
-// AddPinContext pins an item in a channel with a custom context
-func (api *Client) AddPinContext(ctx context.Context, channel string, item ItemRef) error {
-	values := url.Values{
-		"channel": {channel},
-		"token":   {api.config.token},
-	}
-	if item.Timestamp != "" {
-		values.Set("timestamp", string(item.Timestamp))
-	}
-	if item.File != "" {
-		values.Set("file", string(item.File))
-	}
-	if item.Comment != "" {
-		values.Set("file_comment", string(item.Comment))
-	}
-	response := &SlackResponse{}
-	if err := post(ctx, "pins.add", values, response, api.debug); err != nil {
-		return err
-	}
-	if !response.Ok {
-		return errors.New(response.Error)
-	}
-	return nil
-}
-
-// RemovePin un-pins an item from a channel
-func (api *Client) RemovePin(channel string, item ItemRef) error {
-	return api.RemovePinContext(context.Background(), channel, item)
-}
-
-// RemovePinContext un-pins an item from a channel with a custom context
-func (api *Client) RemovePinContext(ctx context.Context, channel string, item ItemRef) error {
-	values := url.Values{
-		"channel": {channel},
-		"token":   {api.config.token},
-	}
-	if item.Timestamp != "" {
-		values.Set("timestamp", string(item.Timestamp))
-	}
-	if item.File != "" {
-		values.Set("file", string(item.File))
-	}
-	if item.Comment != "" {
-		values.Set("file_comment", string(item.Comment))
-	}
-	response := &SlackResponse{}
-	if err := post(ctx, "pins.remove", values, response, api.debug); err != nil {
-		return err
-	}
-	if !response.Ok {
-		return errors.New(response.Error)
-	}
-	return nil
-}
-
-// ListPins returns information about the items a user reacted to.
-func (api *Client) ListPins(channel string) ([]Item, *Paging, error) {
-	return api.ListPinsContext(context.Background(), channel)
-}
-
-// ListPinsContext returns information about the items a user reacted to with a custom context.
-func (api *Client) ListPinsContext(ctx context.Context, channel string) ([]Item, *Paging, error) {
-	values := url.Values{
-		"channel": {channel},
-		"token":   {api.config.token},
-	}
-	response := &listPinsResponseFull{}
-	err := post(ctx, "pins.list", values, response, api.debug)
-	if err != nil {
-		return nil, nil, err
-	}
-	if !response.Ok {
-		return nil, nil, errors.New(response.Error)
-	}
-	return response.Items, &response.Paging, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/reactions.go b/vendor/github.com/matterbridge/slack/reactions.go
deleted file mode 100644
index 9da59241..00000000
--- a/vendor/github.com/matterbridge/slack/reactions.go
+++ /dev/null
@@ -1,267 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-	"strconv"
-)
-
-// ItemReaction is the reactions that have happened on an item.
-type ItemReaction struct {
-	Name  string   `json:"name"`
-	Count int      `json:"count"`
-	Users []string `json:"users"`
-}
-
-// ReactedItem is an item that was reacted to, and the details of the
-// reactions.
-type ReactedItem struct {
-	Item
-	Reactions []ItemReaction
-}
-
-// GetReactionsParameters is the inputs to get reactions to an item.
-type GetReactionsParameters struct {
-	Full bool
-}
-
-// NewGetReactionsParameters initializes the inputs to get reactions to an item.
-func NewGetReactionsParameters() GetReactionsParameters {
-	return GetReactionsParameters{
-		Full: false,
-	}
-}
-
-type getReactionsResponseFull struct {
-	Type string
-	M    struct {
-		Reactions []ItemReaction
-	} `json:"message"`
-	F struct {
-		Reactions []ItemReaction
-	} `json:"file"`
-	FC struct {
-		Reactions []ItemReaction
-	} `json:"comment"`
-	SlackResponse
-}
-
-func (res getReactionsResponseFull) extractReactions() []ItemReaction {
-	switch res.Type {
-	case "message":
-		return res.M.Reactions
-	case "file":
-		return res.F.Reactions
-	case "file_comment":
-		return res.FC.Reactions
-	}
-	return []ItemReaction{}
-}
-
-const (
-	DEFAULT_REACTIONS_USER  = ""
-	DEFAULT_REACTIONS_COUNT = 100
-	DEFAULT_REACTIONS_PAGE  = 1
-	DEFAULT_REACTIONS_FULL  = false
-)
-
-// ListReactionsParameters is the inputs to find all reactions by a user.
-type ListReactionsParameters struct {
-	User  string
-	Count int
-	Page  int
-	Full  bool
-}
-
-// NewListReactionsParameters initializes the inputs to find all reactions
-// performed by a user.
-func NewListReactionsParameters() ListReactionsParameters {
-	return ListReactionsParameters{
-		User:  DEFAULT_REACTIONS_USER,
-		Count: DEFAULT_REACTIONS_COUNT,
-		Page:  DEFAULT_REACTIONS_PAGE,
-		Full:  DEFAULT_REACTIONS_FULL,
-	}
-}
-
-type listReactionsResponseFull struct {
-	Items []struct {
-		Type    string
-		Channel string
-		M       struct {
-			*Message
-		} `json:"message"`
-		F struct {
-			*File
-			Reactions []ItemReaction
-		} `json:"file"`
-		FC struct {
-			*Comment
-			Reactions []ItemReaction
-		} `json:"comment"`
-	}
-	Paging `json:"paging"`
-	SlackResponse
-}
-
-func (res listReactionsResponseFull) extractReactedItems() []ReactedItem {
-	items := make([]ReactedItem, len(res.Items))
-	for i, input := range res.Items {
-		item := ReactedItem{}
-		item.Type = input.Type
-		switch input.Type {
-		case "message":
-			item.Channel = input.Channel
-			item.Message = input.M.Message
-			item.Reactions = input.M.Reactions
-		case "file":
-			item.File = input.F.File
-			item.Reactions = input.F.Reactions
-		case "file_comment":
-			item.File = input.F.File
-			item.Comment = input.FC.Comment
-			item.Reactions = input.FC.Reactions
-		}
-		items[i] = item
-	}
-	return items
-}
-
-// AddReaction adds a reaction emoji to a message, file or file comment.
-func (api *Client) AddReaction(name string, item ItemRef) error {
-	return api.AddReactionContext(context.Background(), name, item)
-}
-
-// AddReactionContext adds a reaction emoji to a message, file or file comment with a custom context.
-func (api *Client) AddReactionContext(ctx context.Context, name string, item ItemRef) error {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if name != "" {
-		values.Set("name", name)
-	}
-	if item.Channel != "" {
-		values.Set("channel", string(item.Channel))
-	}
-	if item.Timestamp != "" {
-		values.Set("timestamp", string(item.Timestamp))
-	}
-	if item.File != "" {
-		values.Set("file", string(item.File))
-	}
-	if item.Comment != "" {
-		values.Set("file_comment", string(item.Comment))
-	}
-	response := &SlackResponse{}
-	if err := post(ctx, "reactions.add", values, response, api.debug); err != nil {
-		return err
-	}
-	if !response.Ok {
-		return errors.New(response.Error)
-	}
-	return nil
-}
-
-// RemoveReaction removes a reaction emoji from a message, file or file comment.
-func (api *Client) RemoveReaction(name string, item ItemRef) error {
-	return api.RemoveReactionContext(context.Background(), name, item)
-}
-
-// RemoveReactionContext removes a reaction emoji from a message, file or file comment with a custom context.
-func (api *Client) RemoveReactionContext(ctx context.Context, name string, item ItemRef) error {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if name != "" {
-		values.Set("name", name)
-	}
-	if item.Channel != "" {
-		values.Set("channel", string(item.Channel))
-	}
-	if item.Timestamp != "" {
-		values.Set("timestamp", string(item.Timestamp))
-	}
-	if item.File != "" {
-		values.Set("file", string(item.File))
-	}
-	if item.Comment != "" {
-		values.Set("file_comment", string(item.Comment))
-	}
-	response := &SlackResponse{}
-	if err := post(ctx, "reactions.remove", values, response, api.debug); err != nil {
-		return err
-	}
-	if !response.Ok {
-		return errors.New(response.Error)
-	}
-	return nil
-}
-
-// GetReactions returns details about the reactions on an item.
-func (api *Client) GetReactions(item ItemRef, params GetReactionsParameters) ([]ItemReaction, error) {
-	return api.GetReactionsContext(context.Background(), item, params)
-}
-
-// GetReactionsContext returns details about the reactions on an item with a custom context
-func (api *Client) GetReactionsContext(ctx context.Context, item ItemRef, params GetReactionsParameters) ([]ItemReaction, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if item.Channel != "" {
-		values.Set("channel", string(item.Channel))
-	}
-	if item.Timestamp != "" {
-		values.Set("timestamp", string(item.Timestamp))
-	}
-	if item.File != "" {
-		values.Set("file", string(item.File))
-	}
-	if item.Comment != "" {
-		values.Set("file_comment", string(item.Comment))
-	}
-	if params.Full != DEFAULT_REACTIONS_FULL {
-		values.Set("full", strconv.FormatBool(params.Full))
-	}
-	response := &getReactionsResponseFull{}
-	if err := post(ctx, "reactions.get", values, response, api.debug); err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response.extractReactions(), nil
-}
-
-// ListReactions returns information about the items a user reacted to.
-func (api *Client) ListReactions(params ListReactionsParameters) ([]ReactedItem, *Paging, error) {
-	return api.ListReactionsContext(context.Background(), params)
-}
-
-// ListReactionsContext returns information about the items a user reacted to with a custom context.
-func (api *Client) ListReactionsContext(ctx context.Context, params ListReactionsParameters) ([]ReactedItem, *Paging, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if params.User != DEFAULT_REACTIONS_USER {
-		values.Add("user", params.User)
-	}
-	if params.Count != DEFAULT_REACTIONS_COUNT {
-		values.Add("count", strconv.Itoa(params.Count))
-	}
-	if params.Page != DEFAULT_REACTIONS_PAGE {
-		values.Add("page", strconv.Itoa(params.Page))
-	}
-	if params.Full != DEFAULT_REACTIONS_FULL {
-		values.Add("full", strconv.FormatBool(params.Full))
-	}
-	response := &listReactionsResponseFull{}
-	err := post(ctx, "reactions.list", values, response, api.debug)
-	if err != nil {
-		return nil, nil, err
-	}
-	if !response.Ok {
-		return nil, nil, errors.New(response.Error)
-	}
-	return response.extractReactedItems(), &response.Paging, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/rtm.go b/vendor/github.com/matterbridge/slack/rtm.go
deleted file mode 100644
index fd5d2002..00000000
--- a/vendor/github.com/matterbridge/slack/rtm.go
+++ /dev/null
@@ -1,105 +0,0 @@
-package slack
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-	"net/url"
-	"time"
-)
-
-// StartRTM calls the "rtm.start" endpoint and returns the provided URL and the full Info block.
-//
-// To have a fully managed Websocket connection, use `NewRTM`, and call `ManageConnection()` on it.
-func (api *Client) StartRTM() (info *Info, websocketURL string, err error) {
-	return api.StartRTMContext(context.Background())
-}
-
-// StartRTMContext calls the "rtm.start" endpoint and returns the provided URL and the full Info block with a custom context.
-//
-// To have a fully managed Websocket connection, use `NewRTM`, and call `ManageConnection()` on it.
-func (api *Client) StartRTMContext(ctx context.Context) (info *Info, websocketURL string, err error) {
-	response := &infoResponseFull{}
-	err = post(ctx, "rtm.start", url.Values{"token": {api.config.token}}, response, api.debug)
-	if err != nil {
-		return nil, "", fmt.Errorf("post: %s", err)
-	}
-	if !response.Ok {
-		return nil, "", response.Error
-	}
-
-	// websocket.Dial does not accept url without the port (yet)
-	// Fixed by: https://github.com/golang/net/commit/5058c78c3627b31e484a81463acd51c7cecc06f3
-	// but slack returns the address with no port, so we have to fix it
-	api.Debugln("Using URL:", response.Info.URL)
-	websocketURL, err = websocketizeURLPort(response.Info.URL)
-	if err != nil {
-		return nil, "", fmt.Errorf("parsing response URL: %s", err)
-	}
-
-	return &response.Info, websocketURL, nil
-}
-
-// ConnectRTM calls the "rtm.connect" endpoint and returns the provided URL and the compact Info block.
-//
-// To have a fully managed Websocket connection, use `NewRTM`, and call `ManageConnection()` on it.
-func (api *Client) ConnectRTM() (info *Info, websocketURL string, err error) {
-	return api.ConnectRTMContext(context.Background())
-}
-
-// ConnectRTM calls the "rtm.connect" endpoint and returns the provided URL and the compact Info block with a custom context.
-//
-// To have a fully managed Websocket connection, use `NewRTM`, and call `ManageConnection()` on it.
-func (api *Client) ConnectRTMContext(ctx context.Context) (info *Info, websocketURL string, err error) {
-	response := &infoResponseFull{}
-	err = post(ctx, "rtm.connect", url.Values{"token": {api.config.token}}, response, api.debug)
-	if err != nil {
-		return nil, "", fmt.Errorf("post: %s", err)
-	}
-	if !response.Ok {
-		return nil, "", response.Error
-	}
-
-	// websocket.Dial does not accept url without the port (yet)
-	// Fixed by: https://github.com/golang/net/commit/5058c78c3627b31e484a81463acd51c7cecc06f3
-	// but slack returns the address with no port, so we have to fix it
-	api.Debugln("Using URL:", response.Info.URL)
-	websocketURL, err = websocketizeURLPort(response.Info.URL)
-	if err != nil {
-		return nil, "", fmt.Errorf("parsing response URL: %s", err)
-	}
-
-	return &response.Info, websocketURL, nil
-}
-
-// NewRTM returns a RTM, which provides a fully managed connection to
-// Slack's websocket-based Real-Time Messaging protocol.
-func (api *Client) NewRTM() *RTM {
-	return api.NewRTMWithOptions(nil)
-}
-
-// NewRTMWithOptions returns a RTM, which provides a fully managed connection to
-// Slack's websocket-based Real-Time Messaging protocol.
-// This also allows to configure various options available for RTM API.
-func (api *Client) NewRTMWithOptions(options *RTMOptions) *RTM {
-	result := &RTM{
-		Client:           *api,
-		IncomingEvents:   make(chan RTMEvent, 50),
-		outgoingMessages: make(chan OutgoingMessage, 20),
-		pings:            make(map[int]time.Time),
-		isConnected:      false,
-		wasIntentional:   true,
-		killChannel:      make(chan bool),
-		forcePing:        make(chan bool),
-		rawEvents:        make(chan json.RawMessage),
-		idGen:            NewSafeID(1),
-	}
-
-	if options != nil {
-		result.useRTMStart = options.UseRTMStart
-	} else {
-		result.useRTMStart = true
-	}
-
-	return result
-}
diff --git a/vendor/github.com/matterbridge/slack/search.go b/vendor/github.com/matterbridge/slack/search.go
deleted file mode 100644
index 0e8d65e2..00000000
--- a/vendor/github.com/matterbridge/slack/search.go
+++ /dev/null
@@ -1,150 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-	"strconv"
-)
-
-const (
-	DEFAULT_SEARCH_SORT      = "score"
-	DEFAULT_SEARCH_SORT_DIR  = "desc"
-	DEFAULT_SEARCH_HIGHLIGHT = false
-	DEFAULT_SEARCH_COUNT     = 100
-	DEFAULT_SEARCH_PAGE      = 1
-)
-
-type SearchParameters struct {
-	Sort          string
-	SortDirection string
-	Highlight     bool
-	Count         int
-	Page          int
-}
-
-type CtxChannel struct {
-	ID   string `json:"id"`
-	Name string `json:"name"`
-}
-
-type CtxMessage struct {
-	User      string `json:"user"`
-	Username  string `json:"username"`
-	Text      string `json:"text"`
-	Timestamp string `json:"ts"`
-	Type      string `json:"type"`
-}
-
-type SearchMessage struct {
-	Type      string     `json:"type"`
-	Channel   CtxChannel `json:"channel"`
-	User      string     `json:"user"`
-	Username  string     `json:"username"`
-	Timestamp string     `json:"ts"`
-	Text      string     `json:"text"`
-	Permalink string     `json:"permalink"`
-	Previous  CtxMessage `json:"previous"`
-	Previous2 CtxMessage `json:"previous_2"`
-	Next      CtxMessage `json:"next"`
-	Next2     CtxMessage `json:"next_2"`
-}
-
-type SearchMessages struct {
-	Matches    []SearchMessage `json:"matches"`
-	Paging     `json:"paging"`
-	Pagination `json:"pagination"`
-	Total      int `json:"total"`
-}
-
-type SearchFiles struct {
-	Matches    []File `json:"matches"`
-	Paging     `json:"paging"`
-	Pagination `json:"pagination"`
-	Total      int `json:"total"`
-}
-
-type searchResponseFull struct {
-	Query          string `json:"query"`
-	SearchMessages `json:"messages"`
-	SearchFiles    `json:"files"`
-	SlackResponse
-}
-
-func NewSearchParameters() SearchParameters {
-	return SearchParameters{
-		Sort:          DEFAULT_SEARCH_SORT,
-		SortDirection: DEFAULT_SEARCH_SORT_DIR,
-		Highlight:     DEFAULT_SEARCH_HIGHLIGHT,
-		Count:         DEFAULT_SEARCH_COUNT,
-		Page:          DEFAULT_SEARCH_PAGE,
-	}
-}
-
-func (api *Client) _search(ctx context.Context, path, query string, params SearchParameters, files, messages bool) (response *searchResponseFull, error error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"query": {query},
-	}
-	if params.Sort != DEFAULT_SEARCH_SORT {
-		values.Add("sort", params.Sort)
-	}
-	if params.SortDirection != DEFAULT_SEARCH_SORT_DIR {
-		values.Add("sort_dir", params.SortDirection)
-	}
-	if params.Highlight != DEFAULT_SEARCH_HIGHLIGHT {
-		values.Add("highlight", strconv.Itoa(1))
-	}
-	if params.Count != DEFAULT_SEARCH_COUNT {
-		values.Add("count", strconv.Itoa(params.Count))
-	}
-	if params.Page != DEFAULT_SEARCH_PAGE {
-		values.Add("page", strconv.Itoa(params.Page))
-	}
-	response = &searchResponseFull{}
-	err := post(ctx, path, values, response, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-
-}
-
-func (api *Client) Search(query string, params SearchParameters) (*SearchMessages, *SearchFiles, error) {
-	return api.SearchContext(context.Background(), query, params)
-}
-
-func (api *Client) SearchContext(ctx context.Context, query string, params SearchParameters) (*SearchMessages, *SearchFiles, error) {
-	response, err := api._search(ctx, "search.all", query, params, true, true)
-	if err != nil {
-		return nil, nil, err
-	}
-	return &response.SearchMessages, &response.SearchFiles, nil
-}
-
-func (api *Client) SearchFiles(query string, params SearchParameters) (*SearchFiles, error) {
-	return api.SearchFilesContext(context.Background(), query, params)
-}
-
-func (api *Client) SearchFilesContext(ctx context.Context, query string, params SearchParameters) (*SearchFiles, error) {
-	response, err := api._search(ctx, "search.files", query, params, true, false)
-	if err != nil {
-		return nil, err
-	}
-	return &response.SearchFiles, nil
-}
-
-func (api *Client) SearchMessages(query string, params SearchParameters) (*SearchMessages, error) {
-	return api.SearchMessagesContext(context.Background(), query, params)
-}
-
-func (api *Client) SearchMessagesContext(ctx context.Context, query string, params SearchParameters) (*SearchMessages, error) {
-	response, err := api._search(ctx, "search.messages", query, params, false, true)
-	if err != nil {
-		return nil, err
-	}
-	return &response.SearchMessages, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/slack.go b/vendor/github.com/matterbridge/slack/slack.go
deleted file mode 100644
index a13bed31..00000000
--- a/vendor/github.com/matterbridge/slack/slack.go
+++ /dev/null
@@ -1,94 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"log"
-	"net/url"
-	"os"
-)
-
-var logger *log.Logger // A logger that can be set by consumers
-/*
-  Added as a var so that we can change this for testing purposes
-*/
-var SLACK_API string = "https://slack.com/api/"
-var SLACK_WEB_API_FORMAT string = "https://%s.slack.com/api/users.admin.%s?t=%s"
-
-type SlackResponse struct {
-	Ok    bool   `json:"ok"`
-	Error string `json:"error"`
-}
-
-type AuthTestResponse struct {
-	URL    string `json:"url"`
-	Team   string `json:"team"`
-	User   string `json:"user"`
-	TeamID string `json:"team_id"`
-	UserID string `json:"user_id"`
-}
-
-type authTestResponseFull struct {
-	SlackResponse
-	AuthTestResponse
-}
-
-type Client struct {
-	config struct {
-		token string
-	}
-	info  Info
-	debug bool
-}
-
-// SetLogger let's library users supply a logger, so that api debugging
-// can be logged along with the application's debugging info.
-func SetLogger(l *log.Logger) {
-	logger = l
-}
-
-func New(token string) *Client {
-	s := &Client{}
-	s.config.token = token
-	return s
-}
-
-// AuthTest tests if the user is able to do authenticated requests or not
-func (api *Client) AuthTest() (response *AuthTestResponse, error error) {
-	return api.AuthTestContext(context.Background())
-}
-
-// AuthTestContext tests if the user is able to do authenticated requests or not with a custom context
-func (api *Client) AuthTestContext(ctx context.Context) (response *AuthTestResponse, error error) {
-	responseFull := &authTestResponseFull{}
-	err := post(ctx, "auth.test", url.Values{"token": {api.config.token}}, responseFull, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	if !responseFull.Ok {
-		return nil, errors.New(responseFull.Error)
-	}
-	return &responseFull.AuthTestResponse, nil
-}
-
-// SetDebug switches the api into debug mode
-// When in debug mode, it logs various info about what its doing
-// If you ever use this in production, don't call SetDebug(true)
-func (api *Client) SetDebug(debug bool) {
-	api.debug = debug
-	if debug && logger == nil {
-		logger = log.New(os.Stdout, "nlopes/slack", log.LstdFlags|log.Lshortfile)
-	}
-}
-
-func (api *Client) Debugf(format string, v ...interface{}) {
-	if api.debug {
-		logger.Printf(format, v...)
-	}
-}
-
-func (api *Client) Debugln(v ...interface{}) {
-	if api.debug {
-		logger.Println(v...)
-	}
-}
diff --git a/vendor/github.com/matterbridge/slack/stars.go b/vendor/github.com/matterbridge/slack/stars.go
deleted file mode 100644
index cf4a4a11..00000000
--- a/vendor/github.com/matterbridge/slack/stars.go
+++ /dev/null
@@ -1,160 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-	"strconv"
-)
-
-const (
-	DEFAULT_STARS_USER  = ""
-	DEFAULT_STARS_COUNT = 100
-	DEFAULT_STARS_PAGE  = 1
-)
-
-type StarsParameters struct {
-	User  string
-	Count int
-	Page  int
-}
-
-type StarredItem Item
-
-type listResponseFull struct {
-	Items  []Item `json:"items"`
-	Paging `json:"paging"`
-	SlackResponse
-}
-
-// NewStarsParameters initialises StarsParameters with default values
-func NewStarsParameters() StarsParameters {
-	return StarsParameters{
-		User:  DEFAULT_STARS_USER,
-		Count: DEFAULT_STARS_COUNT,
-		Page:  DEFAULT_STARS_PAGE,
-	}
-}
-
-// AddStar stars an item in a channel
-func (api *Client) AddStar(channel string, item ItemRef) error {
-	return api.AddStarContext(context.Background(), channel, item)
-}
-
-// AddStarContext stars an item in a channel with a custom context
-func (api *Client) AddStarContext(ctx context.Context, channel string, item ItemRef) error {
-	values := url.Values{
-		"channel": {channel},
-		"token":   {api.config.token},
-	}
-	if item.Timestamp != "" {
-		values.Set("timestamp", string(item.Timestamp))
-	}
-	if item.File != "" {
-		values.Set("file", string(item.File))
-	}
-	if item.Comment != "" {
-		values.Set("file_comment", string(item.Comment))
-	}
-	response := &SlackResponse{}
-	if err := post(ctx, "stars.add", values, response, api.debug); err != nil {
-		return err
-	}
-	if !response.Ok {
-		return errors.New(response.Error)
-	}
-	return nil
-}
-
-// RemoveStar removes a starred item from a channel
-func (api *Client) RemoveStar(channel string, item ItemRef) error {
-	return api.RemoveStarContext(context.Background(), channel, item)
-}
-
-// RemoveStarContext removes a starred item from a channel with a custom context
-func (api *Client) RemoveStarContext(ctx context.Context, channel string, item ItemRef) error {
-	values := url.Values{
-		"channel": {channel},
-		"token":   {api.config.token},
-	}
-	if item.Timestamp != "" {
-		values.Set("timestamp", string(item.Timestamp))
-	}
-	if item.File != "" {
-		values.Set("file", string(item.File))
-	}
-	if item.Comment != "" {
-		values.Set("file_comment", string(item.Comment))
-	}
-	response := &SlackResponse{}
-	if err := post(ctx, "stars.remove", values, response, api.debug); err != nil {
-		return err
-	}
-	if !response.Ok {
-		return errors.New(response.Error)
-	}
-	return nil
-}
-
-// ListStars returns information about the stars a user added
-func (api *Client) ListStars(params StarsParameters) ([]Item, *Paging, error) {
-	return api.ListStarsContext(context.Background(), params)
-}
-
-// ListStarsContext returns information about the stars a user added with a custom context
-func (api *Client) ListStarsContext(ctx context.Context, params StarsParameters) ([]Item, *Paging, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if params.User != DEFAULT_STARS_USER {
-		values.Add("user", params.User)
-	}
-	if params.Count != DEFAULT_STARS_COUNT {
-		values.Add("count", strconv.Itoa(params.Count))
-	}
-	if params.Page != DEFAULT_STARS_PAGE {
-		values.Add("page", strconv.Itoa(params.Page))
-	}
-	response := &listResponseFull{}
-	err := post(ctx, "stars.list", values, response, api.debug)
-	if err != nil {
-		return nil, nil, err
-	}
-	if !response.Ok {
-		return nil, nil, errors.New(response.Error)
-	}
-	return response.Items, &response.Paging, nil
-}
-
-// GetStarred returns a list of StarredItem items.
-//
-// The user then has to iterate over them and figure out what they should
-// be looking at according to what is in the Type.
-//    for _, item := range items {
-//        switch c.Type {
-//        case "file_comment":
-//            log.Println(c.Comment)
-//        case "file":
-//             ...
-//
-//    }
-// This function still exists to maintain backwards compatibility.
-// I exposed it as returning []StarredItem, so it shall stay as StarredItem
-func (api *Client) GetStarred(params StarsParameters) ([]StarredItem, *Paging, error) {
-	return api.GetStarredContext(context.Background(), params)
-}
-
-// GetStarredContext returns a list of StarredItem items with a custom context
-//
-// For more details see GetStarred
-func (api *Client) GetStarredContext(ctx context.Context, params StarsParameters) ([]StarredItem, *Paging, error) {
-	items, paging, err := api.ListStarsContext(ctx, params)
-	if err != nil {
-		return nil, nil, err
-	}
-	starredItems := make([]StarredItem, len(items))
-	for i, item := range items {
-		starredItems[i] = StarredItem(item)
-	}
-	return starredItems, paging, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/team.go b/vendor/github.com/matterbridge/slack/team.go
deleted file mode 100644
index e70ac57e..00000000
--- a/vendor/github.com/matterbridge/slack/team.go
+++ /dev/null
@@ -1,176 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-	"strconv"
-)
-
-const (
-	DEFAULT_LOGINS_COUNT = 100
-	DEFAULT_LOGINS_PAGE  = 1
-)
-
-type TeamResponse struct {
-	Team TeamInfo `json:"team"`
-	SlackResponse
-}
-
-type TeamInfo struct {
-	ID          string                 `json:"id"`
-	Name        string                 `json:"name"`
-	Domain      string                 `json:"domain"`
-	EmailDomain string                 `json:"email_domain"`
-	Icon        map[string]interface{} `json:"icon"`
-}
-
-type LoginResponse struct {
-	Logins []Login `json:"logins"`
-	Paging `json:"paging"`
-	SlackResponse
-}
-
-type Login struct {
-	UserID    string `json:"user_id"`
-	Username  string `json:"username"`
-	DateFirst int    `json:"date_first"`
-	DateLast  int    `json:"date_last"`
-	Count     int    `json:"count"`
-	IP        string `json:"ip"`
-	UserAgent string `json:"user_agent"`
-	ISP       string `json:"isp"`
-	Country   string `json:"country"`
-	Region    string `json:"region"`
-}
-
-type BillableInfoResponse struct {
-	BillableInfo map[string]BillingActive `json:"billable_info"`
-	SlackResponse
-}
-
-type BillingActive struct {
-	BillingActive bool `json:"billing_active"`
-}
-
-// AccessLogParameters contains all the parameters necessary (including the optional ones) for a GetAccessLogs() request
-type AccessLogParameters struct {
-	Count int
-	Page  int
-}
-
-// NewAccessLogParameters provides an instance of AccessLogParameters with all the sane default values set
-func NewAccessLogParameters() AccessLogParameters {
-	return AccessLogParameters{
-		Count: DEFAULT_LOGINS_COUNT,
-		Page:  DEFAULT_LOGINS_PAGE,
-	}
-}
-
-func teamRequest(ctx context.Context, path string, values url.Values, debug bool) (*TeamResponse, error) {
-	response := &TeamResponse{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-
-	return response, nil
-}
-
-func billableInfoRequest(ctx context.Context, path string, values url.Values, debug bool) (map[string]BillingActive, error) {
-	response := &BillableInfoResponse{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-
-	return response.BillableInfo, nil
-}
-
-func accessLogsRequest(ctx context.Context, path string, values url.Values, debug bool) (*LoginResponse, error) {
-	response := &LoginResponse{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-// GetTeamInfo gets the Team Information of the user
-func (api *Client) GetTeamInfo() (*TeamInfo, error) {
-	return api.GetTeamInfoContext(context.Background())
-}
-
-// GetTeamInfoContext gets the Team Information of the user with a custom context
-func (api *Client) GetTeamInfoContext(ctx context.Context) (*TeamInfo, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-
-	response, err := teamRequest(ctx, "team.info", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.Team, nil
-}
-
-// GetAccessLogs retrieves a page of logins according to the parameters given
-func (api *Client) GetAccessLogs(params AccessLogParameters) ([]Login, *Paging, error) {
-	return api.GetAccessLogsContext(context.Background(), params)
-}
-
-// GetAccessLogsContext retrieves a page of logins according to the parameters given with a custom context
-func (api *Client) GetAccessLogsContext(ctx context.Context, params AccessLogParameters) ([]Login, *Paging, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if params.Count != DEFAULT_LOGINS_COUNT {
-		values.Add("count", strconv.Itoa(params.Count))
-	}
-	if params.Page != DEFAULT_LOGINS_PAGE {
-		values.Add("page", strconv.Itoa(params.Page))
-	}
-	response, err := accessLogsRequest(ctx, "team.accessLogs", values, api.debug)
-	if err != nil {
-		return nil, nil, err
-	}
-	return response.Logins, &response.Paging, nil
-}
-
-func (api *Client) GetBillableInfo(user string) (map[string]BillingActive, error) {
-	return api.GetBillableInfoContext(context.Background(), user)
-}
-
-func (api *Client) GetBillableInfoContext(ctx context.Context, user string) (map[string]BillingActive, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"user":  {user},
-	}
-
-	return billableInfoRequest(ctx, "team.billableInfo", values, api.debug)
-}
-
-// GetBillableInfoForTeam returns the billing_active status of all users on the team.
-func (api *Client) GetBillableInfoForTeam() (map[string]BillingActive, error) {
-	return api.GetBillableInfoForTeamContext(context.Background())
-}
-
-// GetBillableInfoForTeamContext returns the billing_active status of all users on the team with a custom context
-func (api *Client) GetBillableInfoForTeamContext(ctx context.Context) (map[string]BillingActive, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-
-	return billableInfoRequest(ctx, "team.billableInfo", values, api.debug)
-}
diff --git a/vendor/github.com/matterbridge/slack/usergroups.go b/vendor/github.com/matterbridge/slack/usergroups.go
deleted file mode 100644
index de9f9864..00000000
--- a/vendor/github.com/matterbridge/slack/usergroups.go
+++ /dev/null
@@ -1,210 +0,0 @@
-package slack
-
-import (
-	"context"
-	"errors"
-	"net/url"
-	"strings"
-)
-
-// UserGroup contains all the information of a user group
-type UserGroup struct {
-	ID          string         `json:"id"`
-	TeamID      string         `json:"team_id"`
-	IsUserGroup bool           `json:"is_usergroup"`
-	Name        string         `json:"name"`
-	Description string         `json:"description"`
-	Handle      string         `json:"handle"`
-	IsExternal  bool           `json:"is_external"`
-	DateCreate  JSONTime       `json:"date_create"`
-	DateUpdate  JSONTime       `json:"date_update"`
-	DateDelete  JSONTime       `json:"date_delete"`
-	AutoType    string         `json:"auto_type"`
-	CreatedBy   string         `json:"created_by"`
-	UpdatedBy   string         `json:"updated_by"`
-	DeletedBy   string         `json:"deleted_by"`
-	Prefs       UserGroupPrefs `json:"prefs"`
-	UserCount   int            `json:"user_count"`
-}
-
-// UserGroupPrefs contains default channels and groups (private channels)
-type UserGroupPrefs struct {
-	Channels []string `json:"channels"`
-	Groups   []string `json:"groups"`
-}
-
-type userGroupResponseFull struct {
-	UserGroups []UserGroup `json:"usergroups"`
-	UserGroup  UserGroup   `json:"usergroup"`
-	Users      []string    `json:"users"`
-	SlackResponse
-}
-
-func userGroupRequest(ctx context.Context, path string, values url.Values, debug bool) (*userGroupResponseFull, error) {
-	response := &userGroupResponseFull{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-// CreateUserGroup creates a new user group
-func (api *Client) CreateUserGroup(userGroup UserGroup) (UserGroup, error) {
-	return api.CreateUserGroupContext(context.Background(), userGroup)
-}
-
-// CreateUserGroupContext creates a new user group with a custom context
-func (api *Client) CreateUserGroupContext(ctx context.Context, userGroup UserGroup) (UserGroup, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"name":  {userGroup.Name},
-	}
-
-	if userGroup.Handle != "" {
-		values["handle"] = []string{userGroup.Handle}
-	}
-
-	if userGroup.Description != "" {
-		values["description"] = []string{userGroup.Description}
-	}
-
-	if len(userGroup.Prefs.Channels) > 0 {
-		values["channels"] = []string{strings.Join(userGroup.Prefs.Channels, ",")}
-	}
-
-	response, err := userGroupRequest(ctx, "usergroups.create", values, api.debug)
-	if err != nil {
-		return UserGroup{}, err
-	}
-	return response.UserGroup, nil
-}
-
-// DisableUserGroup disables an existing user group
-func (api *Client) DisableUserGroup(userGroup string) (UserGroup, error) {
-	return api.DisableUserGroupContext(context.Background(), userGroup)
-}
-
-// DisableUserGroupContext disables an existing user group with a custom context
-func (api *Client) DisableUserGroupContext(ctx context.Context, userGroup string) (UserGroup, error) {
-	values := url.Values{
-		"token":     {api.config.token},
-		"usergroup": {userGroup},
-	}
-
-	response, err := userGroupRequest(ctx, "usergroups.disable", values, api.debug)
-	if err != nil {
-		return UserGroup{}, err
-	}
-	return response.UserGroup, nil
-}
-
-// EnableUserGroup enables an existing user group
-func (api *Client) EnableUserGroup(userGroup string) (UserGroup, error) {
-	return api.EnableUserGroupContext(context.Background(), userGroup)
-}
-
-// EnableUserGroupContext enables an existing user group with a custom context
-func (api *Client) EnableUserGroupContext(ctx context.Context, userGroup string) (UserGroup, error) {
-	values := url.Values{
-		"token":     {api.config.token},
-		"usergroup": {userGroup},
-	}
-
-	response, err := userGroupRequest(ctx, "usergroups.enable", values, api.debug)
-	if err != nil {
-		return UserGroup{}, err
-	}
-	return response.UserGroup, nil
-}
-
-// GetUserGroups returns a list of user groups for the team
-func (api *Client) GetUserGroups() ([]UserGroup, error) {
-	return api.GetUserGroupsContext(context.Background())
-}
-
-// GetUserGroupsContext returns a list of user groups for the team with a custom context
-func (api *Client) GetUserGroupsContext(ctx context.Context) ([]UserGroup, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-
-	response, err := userGroupRequest(ctx, "usergroups.list", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return response.UserGroups, nil
-}
-
-// UpdateUserGroup will update an existing user group
-func (api *Client) UpdateUserGroup(userGroup UserGroup) (UserGroup, error) {
-	return api.UpdateUserGroupContext(context.Background(), userGroup)
-}
-
-// UpdateUserGroupContext will update an existing user group with a custom context
-func (api *Client) UpdateUserGroupContext(ctx context.Context, userGroup UserGroup) (UserGroup, error) {
-	values := url.Values{
-		"token":     {api.config.token},
-		"usergroup": {userGroup.ID},
-	}
-
-	if userGroup.Name != "" {
-		values["name"] = []string{userGroup.Name}
-	}
-
-	if userGroup.Handle != "" {
-		values["handle"] = []string{userGroup.Handle}
-	}
-
-	if userGroup.Description != "" {
-		values["description"] = []string{userGroup.Description}
-	}
-
-	response, err := userGroupRequest(ctx, "usergroups.update", values, api.debug)
-	if err != nil {
-		return UserGroup{}, err
-	}
-	return response.UserGroup, nil
-}
-
-// GetUserGroupMembers will retrieve the current list of users in a group
-func (api *Client) GetUserGroupMembers(userGroup string) ([]string, error) {
-	return api.GetUserGroupMembersContext(context.Background(), userGroup)
-}
-
-// GetUserGroupMembersContext will retrieve the current list of users in a group with a custom context
-func (api *Client) GetUserGroupMembersContext(ctx context.Context, userGroup string) ([]string, error) {
-	values := url.Values{
-		"token":     {api.config.token},
-		"usergroup": {userGroup},
-	}
-
-	response, err := userGroupRequest(ctx, "usergroups.users.list", values, api.debug)
-	if err != nil {
-		return []string{}, err
-	}
-	return response.Users, nil
-}
-
-// UpdateUserGroupMembers will update the members of an existing user group
-func (api *Client) UpdateUserGroupMembers(userGroup string, members string) (UserGroup, error) {
-	return api.UpdateUserGroupMembersContext(context.Background(), userGroup, members)
-}
-
-// UpdateUserGroupMembersContext will update the members of an existing user group with a custom context
-func (api *Client) UpdateUserGroupMembersContext(ctx context.Context, userGroup string, members string) (UserGroup, error) {
-	values := url.Values{
-		"token":     {api.config.token},
-		"usergroup": {userGroup},
-		"users":     {members},
-	}
-
-	response, err := userGroupRequest(ctx, "usergroups.users.update", values, api.debug)
-	if err != nil {
-		return UserGroup{}, err
-	}
-	return response.UserGroup, nil
-}
diff --git a/vendor/github.com/matterbridge/slack/users.go b/vendor/github.com/matterbridge/slack/users.go
deleted file mode 100644
index 82798c93..00000000
--- a/vendor/github.com/matterbridge/slack/users.go
+++ /dev/null
@@ -1,364 +0,0 @@
-package slack
-
-import (
-	"context"
-	"encoding/json"
-	"errors"
-	"net/url"
-)
-
-const (
-	DEFAULT_USER_PHOTO_CROP_X = -1
-	DEFAULT_USER_PHOTO_CROP_Y = -1
-	DEFAULT_USER_PHOTO_CROP_W = -1
-)
-
-// UserProfile contains all the information details of a given user
-type UserProfile struct {
-  FirstName             string `json:"first_name"`
-  LastName              string `json:"last_name"`
-  RealName              string `json:"real_name"`
-  RealNameNormalized    string `json:"real_name_normalized"`
-  DisplayName           string `json:"display_name"`
-  DisplayNameNormalized string `json:"display_name_normalized"`
-  Email                 string `json:"email"`
-  Skype                 string `json:"skype"`
-  Phone                 string `json:"phone"`
-  Image24               string `json:"image_24"`
-  Image32               string `json:"image_32"`
-  Image48               string `json:"image_48"`
-  Image72               string `json:"image_72"`
-  Image192              string `json:"image_192"`
-  ImageOriginal         string `json:"image_original"`
-  Title                 string `json:"title"`
-  BotID                 string `json:"bot_id,omitempty"`
-  ApiAppID              string `json:"api_app_id,omitempty"`
-  StatusText            string `json:"status_text,omitempty"`
-  StatusEmoji           string `json:"status_emoji,omitempty"`
-}
-
-// User contains all the information of a user
-type User struct {
-	ID                string      `json:"id"`
-	Name              string      `json:"name"`
-	Deleted           bool        `json:"deleted"`
-	Color             string      `json:"color"`
-	RealName          string      `json:"real_name"`
-	TZ                string      `json:"tz,omitempty"`
-	TZLabel           string      `json:"tz_label"`
-	TZOffset          int         `json:"tz_offset"`
-	Profile           UserProfile `json:"profile"`
-	IsBot             bool        `json:"is_bot"`
-	IsAdmin           bool        `json:"is_admin"`
-	IsOwner           bool        `json:"is_owner"`
-	IsPrimaryOwner    bool        `json:"is_primary_owner"`
-	IsRestricted      bool        `json:"is_restricted"`
-	IsUltraRestricted bool        `json:"is_ultra_restricted"`
-	Has2FA            bool        `json:"has_2fa"`
-	HasFiles          bool        `json:"has_files"`
-	Presence          string      `json:"presence"`
-}
-
-// UserPresence contains details about a user online status
-type UserPresence struct {
-	Presence        string   `json:"presence,omitempty"`
-	Online          bool     `json:"online,omitempty"`
-	AutoAway        bool     `json:"auto_away,omitempty"`
-	ManualAway      bool     `json:"manual_away,omitempty"`
-	ConnectionCount int      `json:"connection_count,omitempty"`
-	LastActivity    JSONTime `json:"last_activity,omitempty"`
-}
-
-type UserIdentityResponse struct {
-	User UserIdentity `json:"user"`
-	Team TeamIdentity `json:"team"`
-	SlackResponse
-}
-
-type UserIdentity struct {
-	ID       string `json:"id"`
-	Name     string `json:"name"`
-	Email    string `json:"email"`
-	Image24  string `json:"image_24"`
-	Image32  string `json:"image_32"`
-	Image48  string `json:"image_48"`
-	Image72  string `json:"image_72"`
-	Image192 string `json:"image_192"`
-	Image512 string `json:"image_512"`
-}
-
-type TeamIdentity struct {
-	ID            string `json:"id"`
-	Name          string `json:"name"`
-	Domain        string `json:"domain"`
-	Image34       string `json:"image_34"`
-	Image44       string `json:"image_44"`
-	Image68       string `json:"image_68"`
-	Image88       string `json:"image_88"`
-	Image102      string `json:"image_102"`
-	Image132      string `json:"image_132"`
-	Image230      string `json:"image_230"`
-	ImageDefault  bool   `json:"image_default"`
-	ImageOriginal string `json:"image_original"`
-}
-
-type userResponseFull struct {
-	Members      []User                  `json:"members,omitempty"` // ListUsers
-	User         `json:"user,omitempty"` // GetUserInfo
-	UserPresence                         // GetUserPresence
-	SlackResponse
-}
-
-type UserSetPhotoParams struct {
-	CropX int
-	CropY int
-	CropW int
-}
-
-func NewUserSetPhotoParams() UserSetPhotoParams {
-	return UserSetPhotoParams{
-		CropX: DEFAULT_USER_PHOTO_CROP_X,
-		CropY: DEFAULT_USER_PHOTO_CROP_Y,
-		CropW: DEFAULT_USER_PHOTO_CROP_W,
-	}
-}
-
-func userRequest(ctx context.Context, path string, values url.Values, debug bool) (*userResponseFull, error) {
-	response := &userResponseFull{}
-	err := post(ctx, path, values, response, debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-// GetUserPresence will retrieve the current presence status of given user.
-func (api *Client) GetUserPresence(user string) (*UserPresence, error) {
-	return api.GetUserPresenceContext(context.Background(), user)
-}
-
-// GetUserPresenceContext will retrieve the current presence status of given user with a custom context.
-func (api *Client) GetUserPresenceContext(ctx context.Context, user string) (*UserPresence, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"user":  {user},
-	}
-	response, err := userRequest(ctx, "users.getPresence", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.UserPresence, nil
-}
-
-// GetUserInfo will retrieve the complete user information
-func (api *Client) GetUserInfo(user string) (*User, error) {
-	return api.GetUserInfoContext(context.Background(), user)
-}
-
-// GetUserInfoContext will retrieve the complete user information with a custom context
-func (api *Client) GetUserInfoContext(ctx context.Context, user string) (*User, error) {
-	values := url.Values{
-		"token": {api.config.token},
-		"user":  {user},
-	}
-	response, err := userRequest(ctx, "users.info", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return &response.User, nil
-}
-
-// GetUsers returns the list of users (with their detailed information)
-func (api *Client) GetUsers() ([]User, error) {
-	return api.GetUsersContext(context.Background())
-}
-
-// GetUsersContext returns the list of users (with their detailed information) with a custom context
-func (api *Client) GetUsersContext(ctx context.Context) ([]User, error) {
-	values := url.Values{
-		"token":    {api.config.token},
-		"presence": {"1"},
-	}
-	response, err := userRequest(ctx, "users.list", values, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	return response.Members, nil
-}
-
-// SetUserAsActive marks the currently authenticated user as active
-func (api *Client) SetUserAsActive() error {
-	return api.SetUserAsActiveContext(context.Background())
-}
-
-// SetUserAsActiveContext marks the currently authenticated user as active with a custom context
-func (api *Client) SetUserAsActiveContext(ctx context.Context) error {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	_, err := userRequest(ctx, "users.setActive", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-}
-
-// SetUserPresence changes the currently authenticated user presence
-func (api *Client) SetUserPresence(presence string) error {
-	return api.SetUserPresenceContext(context.Background(), presence)
-}
-
-// SetUserPresenceContext changes the currently authenticated user presence with a custom context
-func (api *Client) SetUserPresenceContext(ctx context.Context, presence string) error {
-	values := url.Values{
-		"token":    {api.config.token},
-		"presence": {presence},
-	}
-	_, err := userRequest(ctx, "users.setPresence", values, api.debug)
-	if err != nil {
-		return err
-	}
-	return nil
-
-}
-
-// GetUserIdentity will retrieve user info available per identity scopes
-func (api *Client) GetUserIdentity() (*UserIdentityResponse, error) {
-	return api.GetUserIdentityContext(context.Background())
-}
-
-// GetUserIdentityContext will retrieve user info available per identity scopes with a custom context
-func (api *Client) GetUserIdentityContext(ctx context.Context) (*UserIdentityResponse, error) {
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	response := &UserIdentityResponse{}
-	err := post(ctx, "users.identity", values, response, api.debug)
-	if err != nil {
-		return nil, err
-	}
-	if !response.Ok {
-		return nil, errors.New(response.Error)
-	}
-	return response, nil
-}
-
-// SetUserPhoto changes the currently authenticated user's profile image
-func (api *Client) SetUserPhoto(ctx context.Context, image string, params UserSetPhotoParams) error {
-	return api.SetUserPhoto(context.Background(), image, params)
-}
-
-// SetUserPhotoContext changes the currently authenticated user's profile image using a custom context
-func (api *Client) SetUserPhotoContext(ctx context.Context, image string, params UserSetPhotoParams) error {
-	response := &SlackResponse{}
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	if params.CropX != DEFAULT_USER_PHOTO_CROP_X {
-		values.Add("crop_x", string(params.CropX))
-	}
-	if params.CropY != DEFAULT_USER_PHOTO_CROP_Y {
-		values.Add("crop_y", string(params.CropY))
-	}
-	if params.CropW != DEFAULT_USER_PHOTO_CROP_W {
-		values.Add("crop_w", string(params.CropW))
-	}
-	err := postLocalWithMultipartResponse(ctx, "users.setPhoto", image, "image", values, response, api.debug)
-	if err != nil {
-		return err
-	}
-	if !response.Ok {
-		return errors.New(response.Error)
-	}
-	return nil
-}
-
-// DeleteUserPhoto deletes the current authenticated user's profile image
-func (api *Client) DeleteUserPhoto() error {
-	return api.DeleteUserPhotoContext(context.Background())
-}
-
-// DeleteUserPhotoContext deletes the current authenticated user's profile image with a custom context
-func (api *Client) DeleteUserPhotoContext(ctx context.Context) error {
-	response := &SlackResponse{}
-	values := url.Values{
-		"token": {api.config.token},
-	}
-	err := post(ctx, "users.deletePhoto", values, response, api.debug)
-	if err != nil {
-		return err
-	}
-	if !response.Ok {
-		return errors.New(response.Error)
-	}
-	return nil
-}
-
-// SetUserCustomStatus will set a custom status and emoji for the currently
-// authenticated user. If statusEmoji is "" and statusText is not, the Slack API
-// will automatically set it to ":speech_balloon:". Otherwise, if both are ""
-// the Slack API will unset the custom status/emoji.
-func (api *Client) SetUserCustomStatus(statusText, statusEmoji string) error {
-	return api.SetUserCustomStatusContext(context.Background(), statusText, statusEmoji)
-}
-
-// SetUserCustomStatusContext will set a custom status and emoji for the currently authenticated user with a custom context
-//
-// For more information see SetUserCustomStatus
-func (api *Client) SetUserCustomStatusContext(ctx context.Context, statusText, statusEmoji string) error {
-	// XXX(theckman): this anonymous struct is for making requests to the Slack
-	// API for setting and unsetting a User's Custom Status/Emoji. To change
-	// these values we must provide a JSON document as the profile POST field.
-	//
-	// We use an anonymous struct over UserProfile because to unset the values
-	// on the User's profile we cannot use the `json:"omitempty"` tag. This is
-	// because an empty string ("") is what's used to unset the values. Check
-	// out the API docs for more details:
-	//
-	// - https://api.slack.com/docs/presence-and-status#custom_status
-	profile, err := json.Marshal(
-		&struct {
-			StatusText  string `json:"status_text"`
-			StatusEmoji string `json:"status_emoji"`
-		}{
-			StatusText:  statusText,
-			StatusEmoji: statusEmoji,
-		},
-	)
-
-	if err != nil {
-		return err
-	}
-
-	values := url.Values{
-		"token":   {api.config.token},
-		"profile": {string(profile)},
-	}
-
-	response := &userResponseFull{}
-
-	if err = post(ctx, "users.profile.set", values, response, api.debug); err != nil {
-		return err
-	}
-
-	if !response.Ok {
-		return errors.New(response.Error)
-	}
-
-	return nil
-}
-
-// UnsetUserCustomStatus removes the custom status message for the currently
-// authenticated user. This is a convenience method that wraps (*Client).SetUserCustomStatus().
-func (api *Client) UnsetUserCustomStatus() error {
-	return api.UnsetUserCustomStatusContext(context.Background())
-}
-
-// UnsetUserCustomStatusContext removes the custom status message for the currently authenticated user
-// with a custom context. This is a convenience method that wraps (*Client).SetUserCustomStatus().
-func (api *Client) UnsetUserCustomStatusContext(ctx context.Context) error {
-	return api.SetUserCustomStatusContext(ctx, "", "")
-}
diff --git a/vendor/github.com/matterbridge/slack/websocket.go b/vendor/github.com/matterbridge/slack/websocket.go
deleted file mode 100644
index f3c9cbd8..00000000
--- a/vendor/github.com/matterbridge/slack/websocket.go
+++ /dev/null
@@ -1,93 +0,0 @@
-package slack
-
-import (
-	"encoding/json"
-	"errors"
-	"time"
-
-	"golang.org/x/net/websocket"
-)
-
-const (
-	// MaxMessageTextLength is the current maximum message length in number of characters as defined here
-	// https://api.slack.com/rtm#limits
-	MaxMessageTextLength = 4000
-)
-
-// RTM represents a managed websocket connection. It also supports
-// all the methods of the `Client` type.
-//
-// Create this element with Client's NewRTM() or NewRTMWithOptions(*RTMOptions)
-type RTM struct {
-	idGen IDGenerator
-	pings map[int]time.Time
-
-	// Connection life-cycle
-	conn             *websocket.Conn
-	IncomingEvents   chan RTMEvent
-	outgoingMessages chan OutgoingMessage
-	killChannel      chan bool
-	forcePing        chan bool
-	rawEvents        chan json.RawMessage
-	wasIntentional   bool
-	isConnected      bool
-
-	// Client is the main API, embedded
-	Client
-	websocketURL string
-
-	// UserDetails upon connection
-	info *Info
-
-	// useRTMStart should be set to true if you want to use
-	// rtm.start to connect to Slack, otherwise it will use
-	// rtm.connect
-	useRTMStart bool
-}
-
-// RTMOptions allows configuration of various options available for RTM messaging
-//
-// This structure will evolve in time so please make sure you are always using the
-// named keys for every entry available as per Go 1 compatibility promise adding fields
-// to this structure should not be considered a breaking change.
-type RTMOptions struct {
-	// UseRTMStart set to true in order to use rtm.start or false to use rtm.connect
-	// As of 11th July 2017 you should prefer setting this to false, see:
-	// https://api.slack.com/changelog/2017-04-start-using-rtm-connect-and-stop-using-rtm-start
-	UseRTMStart bool
-}
-
-// Disconnect and wait, blocking until a successful disconnection.
-func (rtm *RTM) Disconnect() error {
-	if !rtm.isConnected {
-		return errors.New("Invalid call to Disconnect - Slack API is already disconnected")
-	}
-	rtm.killChannel <- true
-	return nil
-}
-
-// Reconnect only makes sense if you've successfully disconnectd with Disconnect().
-func (rtm *RTM) Reconnect() error {
-	logger.Println("RTM::Reconnect not implemented!")
-	return nil
-}
-
-// GetInfo returns the info structure received when calling
-// "startrtm", holding all channels, groups and other metadata needed
-// to implement a full chat client. It will be non-nil after a call to
-// StartRTM().
-func (rtm *RTM) GetInfo() *Info {
-	return rtm.info
-}
-
-// SendMessage submits a simple message through the websocket.  For
-// more complicated messages, use `rtm.PostMessage` with a complete
-// struct describing your attachments and all.
-func (rtm *RTM) SendMessage(msg *OutgoingMessage) {
-	if msg == nil {
-		rtm.Debugln("Error: Attempted to SendMessage(nil)")
-		return
-	}
-
-	rtm.outgoingMessages <- *msg
-}
diff --git a/vendor/github.com/matterbridge/slack/websocket_channels.go b/vendor/github.com/matterbridge/slack/websocket_channels.go
deleted file mode 100644
index 7dd3319b..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_channels.go
+++ /dev/null
@@ -1,72 +0,0 @@
-package slack
-
-// ChannelCreatedEvent represents the Channel created event
-type ChannelCreatedEvent struct {
-	Type           string             `json:"type"`
-	Channel        ChannelCreatedInfo `json:"channel"`
-	EventTimestamp string             `json:"event_ts"`
-}
-
-// ChannelCreatedInfo represents the information associated with the Channel created event
-type ChannelCreatedInfo struct {
-	ID        string `json:"id"`
-	IsChannel bool   `json:"is_channel"`
-	Name      string `json:"name"`
-	Created   int    `json:"created"`
-	Creator   string `json:"creator"`
-}
-
-// ChannelJoinedEvent represents the Channel joined event
-type ChannelJoinedEvent struct {
-	Type    string  `json:"type"`
-	Channel Channel `json:"channel"`
-}
-
-// ChannelInfoEvent represents the Channel info event
-type ChannelInfoEvent struct {
-	// channel_left
-	// channel_deleted
-	// channel_archive
-	// channel_unarchive
-	Type      string `json:"type"`
-	Channel   string `json:"channel"`
-	User      string `json:"user,omitempty"`
-	Timestamp string `json:"ts,omitempty"`
-}
-
-// ChannelRenameEvent represents the Channel rename event
-type ChannelRenameEvent struct {
-	Type      string            `json:"type"`
-	Channel   ChannelRenameInfo `json:"channel"`
-	Timestamp string            `json:"event_ts"`
-}
-
-// ChannelRenameInfo represents the information associated with a Channel rename event
-type ChannelRenameInfo struct {
-	ID      string `json:"id"`
-	Name    string `json:"name"`
-	Created string `json:"created"`
-}
-
-// ChannelHistoryChangedEvent represents the Channel history changed event
-type ChannelHistoryChangedEvent struct {
-	Type           string `json:"type"`
-	Latest         string `json:"latest"`
-	Timestamp      string `json:"ts"`
-	EventTimestamp string `json:"event_ts"`
-}
-
-// ChannelMarkedEvent represents the Channel marked event
-type ChannelMarkedEvent ChannelInfoEvent
-
-// ChannelLeftEvent represents the Channel left event
-type ChannelLeftEvent ChannelInfoEvent
-
-// ChannelDeletedEvent represents the Channel deleted event
-type ChannelDeletedEvent ChannelInfoEvent
-
-// ChannelArchiveEvent represents the Channel archive event
-type ChannelArchiveEvent ChannelInfoEvent
-
-// ChannelUnarchiveEvent represents the Channel unarchive event
-type ChannelUnarchiveEvent ChannelInfoEvent
diff --git a/vendor/github.com/matterbridge/slack/websocket_dm.go b/vendor/github.com/matterbridge/slack/websocket_dm.go
deleted file mode 100644
index 98bf6f88..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_dm.go
+++ /dev/null
@@ -1,23 +0,0 @@
-package slack
-
-// IMCreatedEvent represents the IM created event
-type IMCreatedEvent struct {
-	Type    string             `json:"type"`
-	User    string             `json:"user"`
-	Channel ChannelCreatedInfo `json:"channel"`
-}
-
-// IMHistoryChangedEvent represents the IM history changed event
-type IMHistoryChangedEvent ChannelHistoryChangedEvent
-
-// IMOpenEvent represents the IM open event
-type IMOpenEvent ChannelInfoEvent
-
-// IMCloseEvent represents the IM close event
-type IMCloseEvent ChannelInfoEvent
-
-// IMMarkedEvent represents the IM marked event
-type IMMarkedEvent ChannelInfoEvent
-
-// IMMarkedHistoryChanged represents the IM marked history changed event
-type IMMarkedHistoryChanged ChannelInfoEvent
diff --git a/vendor/github.com/matterbridge/slack/websocket_dnd.go b/vendor/github.com/matterbridge/slack/websocket_dnd.go
deleted file mode 100644
index 62ddea3a..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_dnd.go
+++ /dev/null
@@ -1,8 +0,0 @@
-package slack
-
-// DNDUpdatedEvent represents the update event for Do Not Disturb
-type DNDUpdatedEvent struct {
-	Type   string    `json:"type"`
-	User   string    `json:"user"`
-	Status DNDStatus `json:"dnd_status"`
-}
diff --git a/vendor/github.com/matterbridge/slack/websocket_files.go b/vendor/github.com/matterbridge/slack/websocket_files.go
deleted file mode 100644
index 8c5bd4f8..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_files.go
+++ /dev/null
@@ -1,49 +0,0 @@
-package slack
-
-// FileActionEvent represents the File action event
-type fileActionEvent struct {
-	Type           string `json:"type"`
-	EventTimestamp string `json:"event_ts"`
-	File           File   `json:"file"`
-	// FileID is used for FileDeletedEvent
-	FileID string `json:"file_id,omitempty"`
-}
-
-// FileCreatedEvent represents the File created event
-type FileCreatedEvent fileActionEvent
-
-// FileSharedEvent represents the File shared event
-type FileSharedEvent fileActionEvent
-
-// FilePublicEvent represents the File public event
-type FilePublicEvent fileActionEvent
-
-// FileUnsharedEvent represents the File unshared event
-type FileUnsharedEvent fileActionEvent
-
-// FileChangeEvent represents the File change event
-type FileChangeEvent fileActionEvent
-
-// FileDeletedEvent represents the File deleted event
-type FileDeletedEvent fileActionEvent
-
-// FilePrivateEvent represents the File private event
-type FilePrivateEvent fileActionEvent
-
-// FileCommentAddedEvent represents the File comment added event
-type FileCommentAddedEvent struct {
-	fileActionEvent
-	Comment Comment `json:"comment"`
-}
-
-// FileCommentEditedEvent represents the File comment edited event
-type FileCommentEditedEvent struct {
-	fileActionEvent
-	Comment Comment `json:"comment"`
-}
-
-// FileCommentDeletedEvent represents the File comment deleted event
-type FileCommentDeletedEvent struct {
-	fileActionEvent
-	Comment string `json:"comment"`
-}
diff --git a/vendor/github.com/matterbridge/slack/websocket_groups.go b/vendor/github.com/matterbridge/slack/websocket_groups.go
deleted file mode 100644
index eb88985c..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_groups.go
+++ /dev/null
@@ -1,49 +0,0 @@
-package slack
-
-// GroupCreatedEvent represents the Group created event
-type GroupCreatedEvent struct {
-	Type    string             `json:"type"`
-	User    string             `json:"user"`
-	Channel ChannelCreatedInfo `json:"channel"`
-}
-
-// XXX: Should we really do this? event.Group is probably nicer than event.Channel
-// even though the api returns "channel"
-
-// GroupMarkedEvent represents the Group marked event
-type GroupMarkedEvent ChannelInfoEvent
-
-// GroupOpenEvent represents the Group open event
-type GroupOpenEvent ChannelInfoEvent
-
-// GroupCloseEvent represents the Group close event
-type GroupCloseEvent ChannelInfoEvent
-
-// GroupArchiveEvent represents the Group archive event
-type GroupArchiveEvent ChannelInfoEvent
-
-// GroupUnarchiveEvent represents the Group unarchive event
-type GroupUnarchiveEvent ChannelInfoEvent
-
-// GroupLeftEvent represents the Group left event
-type GroupLeftEvent ChannelInfoEvent
-
-// GroupJoinedEvent represents the Group joined event
-type GroupJoinedEvent ChannelJoinedEvent
-
-// GroupRenameEvent represents the Group rename event
-type GroupRenameEvent struct {
-	Type      string          `json:"type"`
-	Group     GroupRenameInfo `json:"channel"`
-	Timestamp string          `json:"ts"`
-}
-
-// GroupRenameInfo represents the group info related to the renamed group
-type GroupRenameInfo struct {
-	ID      string `json:"id"`
-	Name    string `json:"name"`
-	Created string `json:"created"`
-}
-
-// GroupHistoryChangedEvent represents the Group history changed event
-type GroupHistoryChangedEvent ChannelHistoryChangedEvent
diff --git a/vendor/github.com/matterbridge/slack/websocket_internals.go b/vendor/github.com/matterbridge/slack/websocket_internals.go
deleted file mode 100644
index 2a8abe6e..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_internals.go
+++ /dev/null
@@ -1,92 +0,0 @@
-package slack
-
-import (
-	"fmt"
-	"time"
-)
-
-/**
- * Internal events, created by this lib and not mapped to Slack APIs.
- */
-
-// ConnectedEvent is used for when we connect to Slack
-type ConnectedEvent struct {
-	ConnectionCount int // 1 = first time, 2 = second time
-	Info            *Info
-}
-
-// ConnectionErrorEvent contains information about a connection error
-type ConnectionErrorEvent struct {
-	Attempt  int
-	ErrorObj error
-}
-
-func (c *ConnectionErrorEvent) Error() string {
-	return c.ErrorObj.Error()
-}
-
-// ConnectingEvent contains information about our connection attempt
-type ConnectingEvent struct {
-	Attempt         int // 1 = first attempt, 2 = second attempt
-	ConnectionCount int
-}
-
-// DisconnectedEvent contains information about how we disconnected
-type DisconnectedEvent struct {
-	Intentional bool
-}
-
-// LatencyReport contains information about connection latency
-type LatencyReport struct {
-	Value time.Duration
-}
-
-// InvalidAuthEvent is used in case we can't even authenticate with the API
-type InvalidAuthEvent struct{}
-
-// UnmarshallingErrorEvent is used when there are issues deconstructing a response
-type UnmarshallingErrorEvent struct {
-	ErrorObj error
-}
-
-func (u UnmarshallingErrorEvent) Error() string {
-	return u.ErrorObj.Error()
-}
-
-// MessageTooLongEvent is used when sending a message that is too long
-type MessageTooLongEvent struct {
-	Message   OutgoingMessage
-	MaxLength int
-}
-
-func (m *MessageTooLongEvent) Error() string {
-	return fmt.Sprintf("Message too long (max %d characters)", m.MaxLength)
-}
-
-// OutgoingErrorEvent contains information in case there were errors sending messages
-type OutgoingErrorEvent struct {
-	Message  OutgoingMessage
-	ErrorObj error
-}
-
-func (o OutgoingErrorEvent) Error() string {
-	return o.ErrorObj.Error()
-}
-
-// IncomingEventError contains information about an unexpected error receiving a websocket event
-type IncomingEventError struct {
-	ErrorObj error
-}
-
-func (i *IncomingEventError) Error() string {
-	return i.ErrorObj.Error()
-}
-
-// AckErrorEvent i
-type AckErrorEvent struct {
-	ErrorObj error
-}
-
-func (a *AckErrorEvent) Error() string {
-	return a.ErrorObj.Error()
-}
diff --git a/vendor/github.com/matterbridge/slack/websocket_managed_conn.go b/vendor/github.com/matterbridge/slack/websocket_managed_conn.go
deleted file mode 100644
index 9c48852a..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_managed_conn.go
+++ /dev/null
@@ -1,453 +0,0 @@
-package slack
-
-import (
-	"encoding/json"
-	"fmt"
-	"io"
-	"reflect"
-	"time"
-
-	"golang.org/x/net/websocket"
-)
-
-// ManageConnection can be called on a Slack RTM instance returned by the
-// NewRTM method. It will connect to the slack RTM API and handle all incoming
-// and outgoing events. If a connection fails then it will attempt to reconnect
-// and will notify any listeners through an error event on the IncomingEvents
-// channel.
-//
-// If the connection ends and the disconnect was unintentional then this will
-// attempt to reconnect.
-//
-// This should only be called once per slack API! Otherwise expect undefined
-// behavior.
-//
-// The defined error events are located in websocket_internals.go.
-func (rtm *RTM) ManageConnection() {
-	var connectionCount int
-	for {
-		connectionCount++
-		// start trying to connect
-		// the returned err is already passed onto the IncomingEvents channel
-		info, conn, err := rtm.connect(connectionCount, rtm.useRTMStart)
-		// if err != nil then the connection is sucessful - otherwise it is
-		// fatal
-		if err != nil {
-			return
-		}
-		rtm.info = info
-		rtm.IncomingEvents <- RTMEvent{"connected", &ConnectedEvent{
-			ConnectionCount: connectionCount,
-			Info:            info,
-		}}
-
-		rtm.conn = conn
-		rtm.isConnected = true
-
-		keepRunning := make(chan bool)
-		// we're now connected (or have failed fatally) so we can set up
-		// listeners
-		go rtm.handleIncomingEvents(keepRunning)
-
-		// this should be a blocking call until the connection has ended
-		rtm.handleEvents(keepRunning, 30*time.Second)
-
-		// after being disconnected we need to check if it was intentional
-		// if not then we should try to reconnect
-		if rtm.wasIntentional {
-			return
-		}
-		// else continue and run the loop again to connect
-	}
-}
-
-// connect attempts to connect to the slack websocket API. It handles any
-// errors that occur while connecting and will return once a connection
-// has been successfully opened.
-// If useRTMStart is false then it uses rtm.connect to create the connection,
-// otherwise it uses rtm.start.
-func (rtm *RTM) connect(connectionCount int, useRTMStart bool) (*Info, *websocket.Conn, error) {
-	// used to provide exponential backoff wait time with jitter before trying
-	// to connect to slack again
-	boff := &backoff{
-		Min:    100 * time.Millisecond,
-		Max:    5 * time.Minute,
-		Factor: 2,
-		Jitter: true,
-	}
-
-	for {
-		// send connecting event
-		rtm.IncomingEvents <- RTMEvent{"connecting", &ConnectingEvent{
-			Attempt:         boff.attempts + 1,
-			ConnectionCount: connectionCount,
-		}}
-		// attempt to start the connection
-		info, conn, err := rtm.startRTMAndDial(useRTMStart)
-		if err == nil {
-			return info, conn, nil
-		}
-		// check for fatal errors - currently only invalid_auth
-		if sErr, ok := err.(*WebError); ok && (sErr.Error() == "invalid_auth" || sErr.Error() == "account_inactive") {
-			rtm.IncomingEvents <- RTMEvent{"invalid_auth", &InvalidAuthEvent{}}
-			return nil, nil, sErr
-		}
-
-		// any other errors are treated as recoverable and we try again after
-		// sending the event along the IncomingEvents channel
-		rtm.IncomingEvents <- RTMEvent{"connection_error", &ConnectionErrorEvent{
-			Attempt:  boff.attempts,
-			ErrorObj: err,
-		}}
-		// get time we should wait before attempting to connect again
-		dur := boff.Duration()
-		rtm.Debugf("reconnection %d failed: %s", boff.attempts+1, err)
-		rtm.Debugln(" -> reconnecting in", dur)
-		time.Sleep(dur)
-	}
-}
-
-// startRTMAndDial attempts to connect to the slack websocket. If useRTMStart is true,
-// then it returns the  full information returned by the "rtm.start" method on the
-// slack API. Else it uses the "rtm.connect" method to connect
-func (rtm *RTM) startRTMAndDial(useRTMStart bool) (*Info, *websocket.Conn, error) {
-	var info *Info
-	var url string
-	var err error
-
-	if useRTMStart {
-		info, url, err = rtm.StartRTM()
-	} else {
-		info, url, err = rtm.ConnectRTM()
-	}
-	if err != nil {
-		return nil, nil, err
-	}
-
-	conn, err := websocketProxyDial(url, "http://api.slack.com")
-	if err != nil {
-		return nil, nil, err
-	}
-	return info, conn, err
-}
-
-// killConnection stops the websocket connection and signals to all goroutines
-// that they should cease listening to the connection for events.
-//
-// This should not be called directly! Instead a boolean value (true for
-// intentional, false otherwise) should be sent to the killChannel on the RTM.
-func (rtm *RTM) killConnection(keepRunning chan bool, intentional bool) error {
-	rtm.Debugln("killing connection")
-	if rtm.isConnected {
-		close(keepRunning)
-	}
-	rtm.isConnected = false
-	rtm.wasIntentional = intentional
-	err := rtm.conn.Close()
-	rtm.IncomingEvents <- RTMEvent{"disconnected", &DisconnectedEvent{intentional}}
-	return err
-}
-
-// handleEvents is a blocking function that handles all events. This sends
-// pings when asked to (on rtm.forcePing) and upon every given elapsed
-// interval. This also sends outgoing messages that are received from the RTM's
-// outgoingMessages channel. This also handles incoming raw events from the RTM
-// rawEvents channel.
-func (rtm *RTM) handleEvents(keepRunning chan bool, interval time.Duration) {
-	ticker := time.NewTicker(interval)
-	defer ticker.Stop()
-	for {
-		select {
-		// catch "stop" signal on channel close
-		case intentional := <-rtm.killChannel:
-			_ = rtm.killConnection(keepRunning, intentional)
-			return
-			// send pings on ticker interval
-		case <-ticker.C:
-			err := rtm.ping()
-			if err != nil {
-				_ = rtm.killConnection(keepRunning, false)
-				return
-			}
-		case <-rtm.forcePing:
-			err := rtm.ping()
-			if err != nil {
-				_ = rtm.killConnection(keepRunning, false)
-				return
-			}
-		// listen for messages that need to be sent
-		case msg := <-rtm.outgoingMessages:
-			rtm.sendOutgoingMessage(msg)
-		// listen for incoming messages that need to be parsed
-		case rawEvent := <-rtm.rawEvents:
-			rtm.handleRawEvent(rawEvent)
-		}
-	}
-}
-
-// handleIncomingEvents monitors the RTM's opened websocket for any incoming
-// events. It pushes the raw events onto the RTM channel rawEvents.
-//
-// This will stop executing once the RTM's keepRunning channel has been closed
-// or has anything sent to it.
-func (rtm *RTM) handleIncomingEvents(keepRunning <-chan bool) {
-	for {
-		// non-blocking listen to see if channel is closed
-		select {
-		// catch "stop" signal on channel close
-		case <-keepRunning:
-			return
-		default:
-			rtm.receiveIncomingEvent()
-		}
-	}
-}
-
-func (rtm *RTM) sendWithDeadline(msg interface{}) error {
-	// set a write deadline on the connection
-	if err := rtm.conn.SetWriteDeadline(time.Now().Add(10 * time.Second)); err != nil {
-		return err
-	}
-	if err := websocket.JSON.Send(rtm.conn, msg); err != nil {
-		return err
-	}
-	// remove write deadline
-	return rtm.conn.SetWriteDeadline(time.Time{})
-}
-
-// sendOutgoingMessage sends the given OutgoingMessage to the slack websocket.
-//
-// It does not currently detect if a outgoing message fails due to a disconnect
-// and instead lets a future failed 'PING' detect the failed connection.
-func (rtm *RTM) sendOutgoingMessage(msg OutgoingMessage) {
-	rtm.Debugln("Sending message:", msg)
-	if len(msg.Text) > MaxMessageTextLength {
-		rtm.IncomingEvents <- RTMEvent{"outgoing_error", &MessageTooLongEvent{
-			Message:   msg,
-			MaxLength: MaxMessageTextLength,
-		}}
-		return
-	}
-
-	if err := rtm.sendWithDeadline(msg); err != nil {
-		rtm.IncomingEvents <- RTMEvent{"outgoing_error", &OutgoingErrorEvent{
-			Message:  msg,
-			ErrorObj: err,
-		}}
-		// TODO force ping?
-	}
-}
-
-// ping sends a 'PING' message to the RTM's websocket. If the 'PING' message
-// fails to send then this returns an error signifying that the connection
-// should be considered disconnected.
-//
-// This does not handle incoming 'PONG' responses but does store the time of
-// each successful 'PING' send so latency can be detected upon a 'PONG'
-// response.
-func (rtm *RTM) ping() error {
-	id := rtm.idGen.Next()
-	rtm.Debugln("Sending PING ", id)
-	rtm.pings[id] = time.Now()
-
-	msg := &Ping{ID: id, Type: "ping"}
-
-	if err := rtm.sendWithDeadline(msg); err != nil {
-		rtm.Debugf("RTM Error sending 'PING %d': %s", id, err.Error())
-		return err
-	}
-	return nil
-}
-
-// receiveIncomingEvent attempts to receive an event from the RTM's websocket.
-// This will block until a frame is available from the websocket.
-func (rtm *RTM) receiveIncomingEvent() {
-	event := json.RawMessage{}
-	err := websocket.JSON.Receive(rtm.conn, &event)
-	if err == io.EOF {
-		// EOF's don't seem to signify a failed connection so instead we ignore
-		// them here and detect a failed connection upon attempting to send a
-		// 'PING' message
-
-		// trigger a 'PING' to detect pontential websocket disconnect
-		rtm.forcePing <- true
-		return
-	} else if err != nil {
-		rtm.IncomingEvents <- RTMEvent{"incoming_error", &IncomingEventError{
-			ErrorObj: err,
-		}}
-		// force a ping here too?
-		return
-	} else if len(event) == 0 {
-		rtm.Debugln("Received empty event")
-		return
-	}
-	rtm.Debugln("Incoming Event:", string(event[:]))
-	rtm.rawEvents <- event
-}
-
-// handleRawEvent takes a raw JSON message received from the slack websocket
-// and handles the encoded event.
-func (rtm *RTM) handleRawEvent(rawEvent json.RawMessage) {
-	event := &Event{}
-	err := json.Unmarshal(rawEvent, event)
-	if err != nil {
-		rtm.IncomingEvents <- RTMEvent{"unmarshalling_error", &UnmarshallingErrorEvent{err}}
-		return
-	}
-	switch event.Type {
-	case "":
-		rtm.handleAck(rawEvent)
-	case "hello":
-		rtm.IncomingEvents <- RTMEvent{"hello", &HelloEvent{}}
-	case "pong":
-		rtm.handlePong(rawEvent)
-	case "desktop_notification":
-		rtm.Debugln("Received desktop notification, ignoring")
-	default:
-		rtm.handleEvent(event.Type, rawEvent)
-	}
-}
-
-// handleAck handles an incoming 'ACK' message.
-func (rtm *RTM) handleAck(event json.RawMessage) {
-	ack := &AckMessage{}
-	if err := json.Unmarshal(event, ack); err != nil {
-		rtm.Debugln("RTM Error unmarshalling 'ack' event:", err)
-		rtm.Debugln(" -> Erroneous 'ack' event:", string(event))
-		return
-	}
-	if ack.Ok {
-		rtm.IncomingEvents <- RTMEvent{"ack", ack}
-	} else {
-		rtm.IncomingEvents <- RTMEvent{"ack_error", &AckErrorEvent{ack.Error}}
-	}
-}
-
-// handlePong handles an incoming 'PONG' message which should be in response to
-// a previously sent 'PING' message. This is then used to compute the
-// connection's latency.
-func (rtm *RTM) handlePong(event json.RawMessage) {
-	pong := &Pong{}
-	if err := json.Unmarshal(event, pong); err != nil {
-		rtm.Debugln("RTM Error unmarshalling 'pong' event:", err)
-		rtm.Debugln(" -> Erroneous 'ping' event:", string(event))
-		return
-	}
-	if pingTime, exists := rtm.pings[pong.ReplyTo]; exists {
-		latency := time.Since(pingTime)
-		rtm.IncomingEvents <- RTMEvent{"latency_report", &LatencyReport{Value: latency}}
-		delete(rtm.pings, pong.ReplyTo)
-	} else {
-		rtm.Debugln("RTM Error - unmatched 'pong' event:", string(event))
-	}
-}
-
-// handleEvent is the "default" response to an event that does not have a
-// special case. It matches the command's name to a mapping of defined events
-// and then sends the corresponding event struct to the IncomingEvents channel.
-// If the event type is not found or the event cannot be unmarshalled into the
-// correct struct then this sends an UnmarshallingErrorEvent to the
-// IncomingEvents channel.
-func (rtm *RTM) handleEvent(typeStr string, event json.RawMessage) {
-	v, exists := eventMapping[typeStr]
-	if !exists {
-		rtm.Debugf("RTM Error, received unmapped event %q: %s\n", typeStr, string(event))
-		err := fmt.Errorf("RTM Error: Received unmapped event %q: %s\n", typeStr, string(event))
-		rtm.IncomingEvents <- RTMEvent{"unmarshalling_error", &UnmarshallingErrorEvent{err}}
-		return
-	}
-	t := reflect.TypeOf(v)
-	recvEvent := reflect.New(t).Interface()
-	err := json.Unmarshal(event, recvEvent)
-	if err != nil {
-		rtm.Debugf("RTM Error, could not unmarshall event %q: %s\n", typeStr, string(event))
-		err := fmt.Errorf("RTM Error: Could not unmarshall event %q: %s\n", typeStr, string(event))
-		rtm.IncomingEvents <- RTMEvent{"unmarshalling_error", &UnmarshallingErrorEvent{err}}
-		return
-	}
-	rtm.IncomingEvents <- RTMEvent{typeStr, recvEvent}
-}
-
-// eventMapping holds a mapping of event names to their corresponding struct
-// implementations. The structs should be instances of the unmarshalling
-// target for the matching event type.
-var eventMapping = map[string]interface{}{
-	"message":         MessageEvent{},
-	"presence_change": PresenceChangeEvent{},
-	"user_typing":     UserTypingEvent{},
-
-	"channel_marked":          ChannelMarkedEvent{},
-	"channel_created":         ChannelCreatedEvent{},
-	"channel_joined":          ChannelJoinedEvent{},
-	"channel_left":            ChannelLeftEvent{},
-	"channel_deleted":         ChannelDeletedEvent{},
-	"channel_rename":          ChannelRenameEvent{},
-	"channel_archive":         ChannelArchiveEvent{},
-	"channel_unarchive":       ChannelUnarchiveEvent{},
-	"channel_history_changed": ChannelHistoryChangedEvent{},
-
-	"dnd_updated":      DNDUpdatedEvent{},
-	"dnd_updated_user": DNDUpdatedEvent{},
-
-	"im_created":         IMCreatedEvent{},
-	"im_open":            IMOpenEvent{},
-	"im_close":           IMCloseEvent{},
-	"im_marked":          IMMarkedEvent{},
-	"im_history_changed": IMHistoryChangedEvent{},
-
-	"group_marked":          GroupMarkedEvent{},
-	"group_open":            GroupOpenEvent{},
-	"group_joined":          GroupJoinedEvent{},
-	"group_left":            GroupLeftEvent{},
-	"group_close":           GroupCloseEvent{},
-	"group_rename":          GroupRenameEvent{},
-	"group_archive":         GroupArchiveEvent{},
-	"group_unarchive":       GroupUnarchiveEvent{},
-	"group_history_changed": GroupHistoryChangedEvent{},
-
-	"file_created":         FileCreatedEvent{},
-	"file_shared":          FileSharedEvent{},
-	"file_unshared":        FileUnsharedEvent{},
-	"file_public":          FilePublicEvent{},
-	"file_private":         FilePrivateEvent{},
-	"file_change":          FileChangeEvent{},
-	"file_deleted":         FileDeletedEvent{},
-	"file_comment_added":   FileCommentAddedEvent{},
-	"file_comment_edited":  FileCommentEditedEvent{},
-	"file_comment_deleted": FileCommentDeletedEvent{},
-
-	"pin_added":   PinAddedEvent{},
-	"pin_removed": PinRemovedEvent{},
-
-	"star_added":   StarAddedEvent{},
-	"star_removed": StarRemovedEvent{},
-
-	"reaction_added":   ReactionAddedEvent{},
-	"reaction_removed": ReactionRemovedEvent{},
-
-	"pref_change": PrefChangeEvent{},
-
-	"team_join":              TeamJoinEvent{},
-	"team_rename":            TeamRenameEvent{},
-	"team_pref_change":       TeamPrefChangeEvent{},
-	"team_domain_change":     TeamDomainChangeEvent{},
-	"team_migration_started": TeamMigrationStartedEvent{},
-
-	"manual_presence_change": ManualPresenceChangeEvent{},
-
-	"user_change": UserChangeEvent{},
-
-	"emoji_changed": EmojiChangedEvent{},
-
-	"commands_changed": CommandsChangedEvent{},
-
-	"email_domain_changed": EmailDomainChangedEvent{},
-
-	"bot_added":   BotAddedEvent{},
-	"bot_changed": BotChangedEvent{},
-
-	"accounts_changed": AccountsChangedEvent{},
-
-	"reconnect_url": ReconnectUrlEvent{},
-}
diff --git a/vendor/github.com/matterbridge/slack/websocket_misc.go b/vendor/github.com/matterbridge/slack/websocket_misc.go
deleted file mode 100644
index ad283ea1..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_misc.go
+++ /dev/null
@@ -1,121 +0,0 @@
-package slack
-
-import (
-	"encoding/json"
-	"fmt"
-)
-
-// AckMessage is used for messages received in reply to other messages
-type AckMessage struct {
-	ReplyTo   int    `json:"reply_to"`
-	Timestamp string `json:"ts"`
-	Text      string `json:"text"`
-	RTMResponse
-}
-
-// RTMResponse encapsulates response details as returned by the Slack API
-type RTMResponse struct {
-	Ok    bool      `json:"ok"`
-	Error *RTMError `json:"error"`
-}
-
-// RTMError encapsulates error information as returned by the Slack API
-type RTMError struct {
-	Code int
-	Msg  string
-}
-
-func (s RTMError) Error() string {
-	return fmt.Sprintf("Code %d - %s", s.Code, s.Msg)
-}
-
-// MessageEvent represents a Slack Message (used as the event type for an incoming message)
-type MessageEvent Message
-
-// RTMEvent is the main wrapper. You will find all the other messages attached
-type RTMEvent struct {
-	Type string
-	Data interface{}
-}
-
-// HelloEvent represents the hello event
-type HelloEvent struct{}
-
-// PresenceChangeEvent represents the presence change event
-type PresenceChangeEvent struct {
-	Type     string `json:"type"`
-	Presence string `json:"presence"`
-	User     string `json:"user"`
-}
-
-// UserTypingEvent represents the user typing event
-type UserTypingEvent struct {
-	Type    string `json:"type"`
-	User    string `json:"user"`
-	Channel string `json:"channel"`
-}
-
-// PrefChangeEvent represents a user preferences change event
-type PrefChangeEvent struct {
-	Type  string          `json:"type"`
-	Name  string          `json:"name"`
-	Value json.RawMessage `json:"value"`
-}
-
-// ManualPresenceChangeEvent represents the manual presence change event
-type ManualPresenceChangeEvent struct {
-	Type     string `json:"type"`
-	Presence string `json:"presence"`
-}
-
-// UserChangeEvent represents the user change event
-type UserChangeEvent struct {
-	Type string `json:"type"`
-	User User   `json:"user"`
-}
-
-// EmojiChangedEvent represents the emoji changed event
-type EmojiChangedEvent struct {
-	Type           string   `json:"type"`
-	SubType        string   `json:"subtype"`
-	Name           string   `json:"name"`
-	Names          []string `json:"names"`
-	Value          string   `json:"value"` 
-	EventTimestamp string   `json:"event_ts"`
-}
-
-// CommandsChangedEvent represents the commands changed event
-type CommandsChangedEvent struct {
-	Type           string `json:"type"`
-	EventTimestamp string `json:"event_ts"`
-}
-
-// EmailDomainChangedEvent represents the email domain changed event
-type EmailDomainChangedEvent struct {
-	Type           string `json:"type"`
-	EventTimestamp string `json:"event_ts"`
-	EmailDomain    string `json:"email_domain"`
-}
-
-// BotAddedEvent represents the bot added event
-type BotAddedEvent struct {
-	Type string `json:"type"`
-	Bot  Bot    `json:"bot"`
-}
-
-// BotChangedEvent represents the bot changed event
-type BotChangedEvent struct {
-	Type string `json:"type"`
-	Bot  Bot    `json:"bot"`
-}
-
-// AccountsChangedEvent represents the accounts changed event
-type AccountsChangedEvent struct {
-	Type string `json:"type"`
-}
-
-// ReconnectUrlEvent represents the receiving reconnect url event
-type ReconnectUrlEvent struct {
-	Type string `json:"type"`
-	URL  string `json:"url"`
-}
diff --git a/vendor/github.com/matterbridge/slack/websocket_pins.go b/vendor/github.com/matterbridge/slack/websocket_pins.go
deleted file mode 100644
index 95445e28..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_pins.go
+++ /dev/null
@@ -1,16 +0,0 @@
-package slack
-
-type pinEvent struct {
-	Type           string `json:"type"`
-	User           string `json:"user"`
-	Item           Item   `json:"item"`
-	Channel        string `json:"channel_id"`
-	EventTimestamp string `json:"event_ts"`
-	HasPins        bool   `json:"has_pins,omitempty"`
-}
-
-// PinAddedEvent represents the Pin added event
-type PinAddedEvent pinEvent
-
-// PinRemovedEvent represents the Pin removed event
-type PinRemovedEvent pinEvent
diff --git a/vendor/github.com/matterbridge/slack/websocket_proxy.go b/vendor/github.com/matterbridge/slack/websocket_proxy.go
deleted file mode 100644
index 440015d6..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_proxy.go
+++ /dev/null
@@ -1,83 +0,0 @@
-package slack
-
-import (
-	"crypto/tls"
-	"errors"
-	"net"
-	"net/http"
-	"net/http/httputil"
-	"net/url"
-	"os"
-	"strings"
-
-	"golang.org/x/net/websocket"
-)
-
-// Taken and reworked from: https://gist.github.com/madmo/8548738
-func websocketHTTPConnect(proxy, urlString string) (net.Conn, error) {
-	p, err := net.Dial("tcp", proxy)
-	if err != nil {
-		return nil, err
-	}
-
-	turl, err := url.Parse(urlString)
-	if err != nil {
-		return nil, err
-	}
-
-	req := http.Request{
-		Method: "CONNECT",
-		URL:    &url.URL{},
-		Host:   turl.Host,
-	}
-
-	cc := httputil.NewProxyClientConn(p, nil)
-	cc.Do(&req)
-	if err != nil && err != httputil.ErrPersistEOF {
-		return nil, err
-	}
-
-	rwc, _ := cc.Hijack()
-
-	return rwc, nil
-}
-
-func websocketProxyDial(urlString, origin string) (ws *websocket.Conn, err error) {
-	if os.Getenv("HTTP_PROXY") == "" {
-		return websocket.Dial(urlString, "", origin)
-	}
-
-	purl, err := url.Parse(os.Getenv("HTTP_PROXY"))
-	if err != nil {
-		return nil, err
-	}
-
-	config, err := websocket.NewConfig(urlString, origin)
-	if err != nil {
-		return nil, err
-	}
-
-	client, err := websocketHTTPConnect(purl.Host, urlString)
-	if err != nil {
-		return nil, err
-	}
-
-	switch config.Location.Scheme {
-	case "ws":
-	case "wss":
-		tlsClient := tls.Client(client, &tls.Config{
-			ServerName: strings.Split(config.Location.Host, ":")[0],
-		})
-		err := tlsClient.Handshake()
-		if err != nil {
-			tlsClient.Close()
-			return nil, err
-		}
-		client = tlsClient
-
-	default:
-		return nil, errors.New("invalid websocket schema")
-	}
-
-	return websocket.NewClient(config, client)
-}
diff --git a/vendor/github.com/matterbridge/slack/websocket_reactions.go b/vendor/github.com/matterbridge/slack/websocket_reactions.go
deleted file mode 100644
index e4973878..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_reactions.go
+++ /dev/null
@@ -1,25 +0,0 @@
-package slack
-
-// reactionItem is a lighter-weight item than is returned by the reactions list.
-type reactionItem struct {
-	Type        string `json:"type"`
-	Channel     string `json:"channel,omitempty"`
-	File        string `json:"file,omitempty"`
-	FileComment string `json:"file_comment,omitempty"`
-	Timestamp   string `json:"ts,omitempty"`
-}
-
-type reactionEvent struct {
-	Type           string       `json:"type"`
-	User           string       `json:"user"`
-	ItemUser       string       `json:"item_user"`
-	Item           reactionItem `json:"item"`
-	Reaction       string       `json:"reaction"`
-	EventTimestamp string       `json:"event_ts"`
-}
-
-// ReactionAddedEvent represents the Reaction added event
-type ReactionAddedEvent reactionEvent
-
-// ReactionRemovedEvent represents the Reaction removed event
-type ReactionRemovedEvent reactionEvent
diff --git a/vendor/github.com/matterbridge/slack/websocket_stars.go b/vendor/github.com/matterbridge/slack/websocket_stars.go
deleted file mode 100644
index e0f2dda3..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_stars.go
+++ /dev/null
@@ -1,14 +0,0 @@
-package slack
-
-type starEvent struct {
-	Type           string      `json:"type"`
-	User           string      `json:"user"`
-	Item           StarredItem `json:"item"`
-	EventTimestamp string      `json:"event_ts"`
-}
-
-// StarAddedEvent represents the Star added event
-type StarAddedEvent starEvent
-
-// StarRemovedEvent represents the Star removed event
-type StarRemovedEvent starEvent
diff --git a/vendor/github.com/matterbridge/slack/websocket_teams.go b/vendor/github.com/matterbridge/slack/websocket_teams.go
deleted file mode 100644
index 3898c833..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_teams.go
+++ /dev/null
@@ -1,33 +0,0 @@
-package slack
-
-// TeamJoinEvent represents the Team join event
-type TeamJoinEvent struct {
-	Type string `json:"type"`
-	User User   `json:"user"`
-}
-
-// TeamRenameEvent represents the Team rename event
-type TeamRenameEvent struct {
-	Type           string `json:"type"`
-	Name           string `json:"name,omitempty"`
-	EventTimestamp string `json:"event_ts,omitempty"`
-}
-
-// TeamPrefChangeEvent represents the Team preference change event
-type TeamPrefChangeEvent struct {
-	Type  string   `json:"type"`
-	Name  string   `json:"name,omitempty"`
-	Value []string `json:"value,omitempty"`
-}
-
-// TeamDomainChangeEvent represents the Team domain change event
-type TeamDomainChangeEvent struct {
-	Type   string `json:"type"`
-	URL    string `json:"url"`
-	Domain string `json:"domain"`
-}
-
-// TeamMigrationStartedEvent represents the Team migration started event
-type TeamMigrationStartedEvent struct {
-	Type string `json:"type"`
-}
diff --git a/vendor/github.com/matterbridge/slack/websocket_utils.go b/vendor/github.com/matterbridge/slack/websocket_utils.go
deleted file mode 100644
index b3d0ec89..00000000
--- a/vendor/github.com/matterbridge/slack/websocket_utils.go
+++ /dev/null
@@ -1,20 +0,0 @@
-package slack
-
-import (
-	"net"
-	"net/url"
-)
-
-var portMapping = map[string]string{"ws": "80", "wss": "443"}
-
-func websocketizeURLPort(orig string) (string, error) {
-	urlObj, err := url.ParseRequestURI(orig)
-	if err != nil {
-		return "", err
-	}
-	_, _, err = net.SplitHostPort(urlObj.Host)
-	if err != nil {
-		return urlObj.Scheme + "://" + urlObj.Host + ":" + portMapping[urlObj.Scheme] + urlObj.Path, nil
-	}
-	return orig, nil
-}