Update of nlopes/slack dependency (#511)

23 files changed, 992 insertions, 92 deletions

diff --git a/go.mod b/go.mod
index 844d8dc6..b5b18874 100644
--- a/go.mod
+++ b/go.mod
@@ -27,6 +27,8 @@ require (
 	github.com/labstack/echo v0.0.0-20180219162101-7eec915044a1
 	github.com/labstack/gommon v0.2.1 // indirect
 	github.com/lrstanley/girc v0.0.0-20180913221000-0fb5b684054e
+	github.com/lusis/go-slackbot v0.0.0-20180109053408-401027ccfef5 // indirect
+	github.com/lusis/slack-test v0.0.0-20180109053238-3c758769bfa6 // indirect
 	github.com/magiconair/properties v0.0.0-20180217134545-2c9e95027885 // indirect
 	github.com/matterbridge/discordgo v0.0.0-20180806170629-ef40ff5ba64f
 	github.com/matterbridge/go-xmpp v0.0.0-20180529212104-cd19799fba91
@@ -41,7 +43,7 @@ require (
 	github.com/mreiferson/go-httpclient v0.0.0-20160630210159-31f0106b4474 // indirect
 	github.com/mrexodia/wray v0.0.0-20160318003008-78a2c1f284ff // indirect
 	github.com/nicksnyder/go-i18n v1.4.0 // indirect
-	github.com/nlopes/slack v0.3.1-0.20180805133408-21749ab136a8
+	github.com/nlopes/slack v0.4.0
 	github.com/onsi/ginkgo v1.6.0 // indirect
 	github.com/onsi/gomega v1.4.1 // indirect
 	github.com/paulrosania/go-charset v0.0.0-20151028000031-621bb39fcc83
diff --git a/go.sum b/go.sum
index aa2f2f05..832c279e 100644
--- a/go.sum
+++ b/go.sum
@@ -51,10 +51,12 @@ github.com/labstack/echo v0.0.0-20180219162101-7eec915044a1 h1:cOIt0LZKdfeirAfTP
 github.com/labstack/echo v0.0.0-20180219162101-7eec915044a1/go.mod h1:0INS7j/VjnFxD4E2wkz67b8cVwCLbBmJyDaka6Cmk1s=
 github.com/labstack/gommon v0.2.1 h1:C+I4NYknueQncqKYZQ34kHsLZJVeB5KwPUhnO0nmbpU=
 github.com/labstack/gommon v0.2.1/go.mod h1:/tj9csK2iPSBvn+3NLM9e52usepMtrd5ilFYA+wQNJ4=
-github.com/lrstanley/girc v0.0.0-20180427160007-102f17f86306 h1:IqN61cmi7LM/IaYaP9a/KXFtHRS2a3+WHu8GhAXJT7c=
-github.com/lrstanley/girc v0.0.0-20180427160007-102f17f86306/go.mod h1:7cRs1SIBfKQ7e3Tam6GKTILSNHzR862JD0JpINaZoJk=
 github.com/lrstanley/girc v0.0.0-20180913221000-0fb5b684054e h1:RpktB2igr6nS1EN7bCvjldAEfngrM5GyAbmOa4/cafU=
 github.com/lrstanley/girc v0.0.0-20180913221000-0fb5b684054e/go.mod h1:7cRs1SIBfKQ7e3Tam6GKTILSNHzR862JD0JpINaZoJk=
+github.com/lusis/go-slackbot v0.0.0-20180109053408-401027ccfef5 h1:AsEBgzv3DhuYHI/GiQh2HxvTP71HCCE9E/tzGUzGdtU=
+github.com/lusis/go-slackbot v0.0.0-20180109053408-401027ccfef5/go.mod h1:c2mYKRyMb1BPkO5St0c/ps62L4S0W2NAkaTXj9qEI+0=
+github.com/lusis/slack-test v0.0.0-20180109053238-3c758769bfa6 h1:iOAVXzZyXtW408TMYejlUPo6BIn92HmOacWtIfNyYns=
+github.com/lusis/slack-test v0.0.0-20180109053238-3c758769bfa6/go.mod h1:sFlOUpQL1YcjhFVXhg1CG8ZASEs/Mf1oVb6H75JL/zg=
 github.com/magiconair/properties v0.0.0-20180217134545-2c9e95027885 h1:HWxJJvF+QceKcql4r9PC93NtMEgEBfBxlQrZPvbcQvs=
 github.com/magiconair/properties v0.0.0-20180217134545-2c9e95027885/go.mod h1:PppfXfuXeibc/6YijjN8zIbojt8czPbwD3XqdrwzmxQ=
 github.com/matterbridge/discordgo v0.0.0-20180806170629-ef40ff5ba64f h1:9IIOO9Aznn8zJx3nokZ4U6nfuzWw5xAlygPvuRZMisQ=
@@ -83,10 +85,8 @@ github.com/mrexodia/wray v0.0.0-20160318003008-78a2c1f284ff h1:HLGD5/9UxxfEuO9Dt
 github.com/mrexodia/wray v0.0.0-20160318003008-78a2c1f284ff/go.mod h1:B8jLfIIPn2sKyWr0D7cL2v7tnrDD5z291s2Zypdu89E=
 github.com/nicksnyder/go-i18n v1.4.0 h1:AgLl+Yq7kg5OYlzCgu9cKTZOyI4tD/NgukKqLqC8E+I=
 github.com/nicksnyder/go-i18n v1.4.0/go.mod h1:HrK7VCrbOvQoUAQ7Vpy7i87N7JZZZ7R2xBGjv0j365Q=
-github.com/nlopes/slack v0.0.0-20180101221843-107290b5bbaf h1:M+xGhDxie/MqC+tzs+3ZHBSY4Wsv+fEkrpIMCKy8PTg=
-github.com/nlopes/slack v0.0.0-20180101221843-107290b5bbaf/go.mod h1:jVI4BBK3lSktibKahxBF74txcK2vyvkza1z/+rRnVAM=
-github.com/nlopes/slack v0.3.1-0.20180805133408-21749ab136a8 h1:PSy8NkmkyldLmPPnNNw7mwfQFOHDqOI6bINpJ+/KV7Y=
-github.com/nlopes/slack v0.3.1-0.20180805133408-21749ab136a8/go.mod h1:jVI4BBK3lSktibKahxBF74txcK2vyvkza1z/+rRnVAM=
+github.com/nlopes/slack v0.4.0 h1:OVnHm7lv5gGT5gkcHsZAyw++oHVFihbjWbL3UceUpiA=
+github.com/nlopes/slack v0.4.0/go.mod h1:jVI4BBK3lSktibKahxBF74txcK2vyvkza1z/+rRnVAM=
 github.com/onsi/ginkgo v1.6.0 h1:Ix8l273rp3QzYgXSR+c8d1fTG7UPgYkOSELPhiY/YGw=
 github.com/onsi/ginkgo v1.6.0/go.mod h1:lLunBs/Ym6LB5Z9jYTR76FiuTmxDTDusOGeTQH+WWjE=
 github.com/onsi/gomega v1.4.1 h1:PZSj/UFNaVp3KxrzHOcS7oyuWA7LoOY/77yCTEFu21U=
diff --git a/vendor/github.com/labstack/echo/Gopkg.toml b/vendor/github.com/labstack/echo/Gopkg.toml
new file mode 100644
index 00000000..a24f61b9
--- /dev/null
+++ b/vendor/github.com/labstack/echo/Gopkg.toml
@@ -0,0 +1,87 @@
+
+## Gopkg.toml example (these lines may be deleted)
+
+## "metadata" defines metadata about the project that could be used by other independent
+## systems. The metadata defined here will be ignored by dep.
+# [metadata]
+# key1 = "value that convey data to other systems"
+# system1-data = "value that is used by a system"
+# system2-data = "value that is used by another system"
+
+## "required" lists a set of packages (not projects) that must be included in
+## Gopkg.lock. This list is merged with the set of packages imported by the current
+## project. Use it when your project needs a package it doesn't explicitly import -
+## including "main" packages.
+# required = ["github.com/user/thing/cmd/thing"]
+
+## "ignored" lists a set of packages (not projects) that are ignored when
+## dep statically analyzes source code. Ignored packages can be in this project,
+## or in a dependency.
+# ignored = ["github.com/user/project/badpkg"]
+
+## Constraints are rules for how directly imported projects
+## may be incorporated into the depgraph. They are respected by
+## dep whether coming from the Gopkg.toml of the current project or a dependency.
+# [[constraint]]
+## Required: the root import path of the project being constrained.
+# name = "github.com/user/project"
+#
+## Recommended: the version constraint to enforce for the project.
+## Only one of "branch", "version" or "revision" can be specified.
+# version = "1.0.0"
+# branch = "master"
+# revision = "abc123"
+#
+## Optional: an alternate location (URL or import path) for the project's source.
+# source = "https://github.com/myfork/package.git"
+#
+## "metadata" defines metadata about the dependency or override that could be used
+## by other independent systems. The metadata defined here will be ignored by dep.
+# [metadata]
+# key1 = "value that convey data to other systems"
+# system1-data = "value that is used by a system"
+# system2-data = "value that is used by another system"
+
+## Overrides have the same structure as [[constraint]], but supersede all
+## [[constraint]] declarations from all projects. Only [[override]] from
+## the current project's are applied.
+##
+## Overrides are a sledgehammer. Use them only as a last resort.
+# [[override]]
+## Required: the root import path of the project being constrained.
+# name = "github.com/user/project"
+#
+## Optional: specifying a version constraint override will cause all other
+## constraints on this project to be ignored; only the overridden constraint
+## need be satisfied.
+## Again, only one of "branch", "version" or "revision" can be specified.
+# version = "1.0.0"
+# branch = "master"
+# revision = "abc123"
+#
+## Optional: specifying an alternate source location as an override will
+## enforce that the alternate location is used for that project, regardless of
+## what source location any dependent projects specify.
+# source = "https://github.com/myfork/package.git"
+
+
+
+[[constraint]]
+  name = "github.com/dgrijalva/jwt-go"
+  version = "3.0.0"
+
+[[constraint]]
+  name = "github.com/labstack/gommon"
+  version = "0.2.1"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.1.4"
+
+[[constraint]]
+  branch = "master"
+  name = "github.com/valyala/fasttemplate"
+
+[[constraint]]
+  branch = "master"
+  name = "golang.org/x/crypto"
diff --git a/vendor/github.com/nlopes/slack/CHANGELOG.md b/vendor/github.com/nlopes/slack/CHANGELOG.md
index a79ea50c..cf0fc2cc 100644
--- a/vendor/github.com/nlopes/slack/CHANGELOG.md
+++ b/vendor/github.com/nlopes/slack/CHANGELOG.md
@@ -1,3 +1,15 @@
+### v0.4.0 - October 06, 2018

+full differences can be viewed using `git log --oneline --decorate --color v0.3.0..v0.4.0`

+- Breaking Change: renamed ApplyMessageOption, to mark it as unsafe,

+this means it may break without warning in the future.

+- Breaking: Msg structure files field changed to an array.

+- General: implementation for new security headers.

+- RTM: deadlock fix between connect/disconnect.

+- Events: various new fields added.

+- Web: various fixes, new fields exposed, new methods added.

+- Interactions: minor additions expect breaking changes in next release for dialogs/button clicks.

+- Utils: new methods added.

+

 ### v0.3.0 - July 30, 2018

 full differences can be viewed using `git log --oneline --decorate --color v0.2.0..v0.3.0`

 - slack events initial support added. (still considered experimental and undergoing changes, stability not promised)

diff --git a/vendor/github.com/nlopes/slack/Gopkg.lock b/vendor/github.com/nlopes/slack/Gopkg.lock
index 5cc0520e..9c33d0dc 100644
--- a/vendor/github.com/nlopes/slack/Gopkg.lock
+++ b/vendor/github.com/nlopes/slack/Gopkg.lock
@@ -14,6 +14,12 @@
   version = "v1.2.0"
 
 [[projects]]
+  name = "github.com/pkg/errors"
+  packages = ["."]
+  revision = "645ef00459ed84a119197bfb8d8205042c6df63d"
+  version = "v0.8.0"
+
+[[projects]]
   name = "github.com/pmezard/go-difflib"
   packages = ["difflib"]
   revision = "792786c7400a136282c1664665ae0a8db921c6c2"
@@ -28,6 +34,6 @@
 [solve-meta]
   analyzer-name = "dep"
   analyzer-version = 1
-  inputs-digest = "888307bf47ee004aaaa4c45e6139929b4984f2253e48e382246bfb8c66f3cd65"
+  inputs-digest = "596fa546322c2a1e9708a10c9f39aca2e04792b477fab86fb2899fbaab776070"
   solver-name = "gps-cdcl"
   solver-version = 1
diff --git a/vendor/github.com/nlopes/slack/Gopkg.toml b/vendor/github.com/nlopes/slack/Gopkg.toml
new file mode 100644
index 00000000..257870d6
--- /dev/null
+++ b/vendor/github.com/nlopes/slack/Gopkg.toml
@@ -0,0 +1,17 @@
+ignored = ["github.com/lusis/slack-test"]
+
+[[constraint]]
+  name = "github.com/gorilla/websocket"
+  version = "1.2.0"
+
+[[constraint]]
+  name = "github.com/stretchr/testify"
+  version = "1.2.1"
+
+[[constraint]]
+  name = "github.com/pkg/errors"
+  version = "0.8.0"
+
+[prune]
+  go-tests = true
+  unused-packages = true
diff --git a/vendor/github.com/nlopes/slack/chat.go b/vendor/github.com/nlopes/slack/chat.go
index 2b89a44c..8cc6bdef 100644
--- a/vendor/github.com/nlopes/slack/chat.go
+++ b/vendor/github.com/nlopes/slack/chat.go
@@ -4,7 +4,8 @@ import (
 	"context"
 	"encoding/json"
 	"net/url"
-	"strings"
+
+	"github.com/nlopes/slack/slackutilsx"
 )
 
 const (
@@ -164,22 +165,24 @@ func (api *Client) SendMessageContext(ctx context.Context, channelID string, opt
 		return "", "", "", err
 	}
 
-	if err = postSlackMethod(ctx, api.httpclient, string(config.mode), config.values, &response, api.debug); err != nil {
+	if err = postForm(ctx, api.httpclient, config.endpoint, config.values, &response, api.debug); err != nil {
 		return "", "", "", err
 	}
 
 	return response.Channel, response.getMessageTimestamp(), response.Text, response.Err()
 }
 
-// ApplyMsgOptions utility function for debugging/testing chat requests.
-func ApplyMsgOptions(token, channel string, options ...MsgOption) (string, url.Values, error) {
+// UnsafeApplyMsgOptions utility function for debugging/testing chat requests.
+// NOTE: USE AT YOUR OWN RISK: No issues relating to the use of this function
+// will be supported by the library.
+func UnsafeApplyMsgOptions(token, channel string, options ...MsgOption) (string, url.Values, error) {
 	config, err := applyMsgOptions(token, channel, options...)
-	return string(config.mode), config.values, err
+	return config.endpoint, config.values, err
 }
 
 func applyMsgOptions(token, channel string, options ...MsgOption) (sendConfig, error) {
 	config := sendConfig{
-		mode: chatPostMessage,
+		endpoint: SLACK_API + string(chatPostMessage),
 		values: url.Values{
 			"token":   {token},
 			"channel": {channel},
@@ -195,11 +198,6 @@ func applyMsgOptions(token, channel string, options ...MsgOption) (sendConfig, e
 	return config, nil
 }
 
-func escapeMessage(message string) string {
-	replacer := strings.NewReplacer("&", "&amp;", "<", "&lt;", ">", "&gt;")
-	return replacer.Replace(message)
-}
-
 type sendMode string
 
 const (
@@ -211,8 +209,8 @@ const (
 )
 
 type sendConfig struct {
-	mode   sendMode
-	values url.Values
+	endpoint string
+	values   url.Values
 }
 
 // MsgOption option provided when sending a message.
@@ -221,7 +219,7 @@ 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.endpoint = SLACK_API + string(chatPostMessage)
 		config.values.Del("ts")
 		return nil
 	}
@@ -231,7 +229,7 @@ func MsgOptionPost() MsgOption {
 // posts an ephemeral message.
 func MsgOptionPostEphemeral() MsgOption {
 	return func(config *sendConfig) error {
-		config.mode = chatPostEphemeral
+		config.endpoint = SLACK_API + string(chatPostEphemeral)
 		config.values.Del("ts")
 		return nil
 	}
@@ -240,7 +238,7 @@ func MsgOptionPostEphemeral() MsgOption {
 // MsgOptionPostEphemeral2 - posts an ephemeral message to the provided user.
 func MsgOptionPostEphemeral2(userID string) MsgOption {
 	return func(config *sendConfig) error {
-		config.mode = chatPostEphemeral
+		config.endpoint = SLACK_API + string(chatPostEphemeral)
 		MsgOptionUser(userID)(config)
 		config.values.Del("ts")
 
@@ -251,7 +249,7 @@ func MsgOptionPostEphemeral2(userID string) MsgOption {
 // MsgOptionMeMessage posts a "me message" type from the calling user
 func MsgOptionMeMessage() MsgOption {
 	return func(config *sendConfig) error {
-		config.mode = chatMeMessage
+		config.endpoint = SLACK_API + string(chatMeMessage)
 		return nil
 	}
 }
@@ -259,7 +257,7 @@ func MsgOptionMeMessage() MsgOption {
 // MsgOptionUpdate updates a message based on the timestamp.
 func MsgOptionUpdate(timestamp string) MsgOption {
 	return func(config *sendConfig) error {
-		config.mode = chatUpdate
+		config.endpoint = SLACK_API + string(chatUpdate)
 		config.values.Add("ts", timestamp)
 		return nil
 	}
@@ -268,7 +266,7 @@ func MsgOptionUpdate(timestamp string) MsgOption {
 // MsgOptionDelete deletes a message based on the timestamp.
 func MsgOptionDelete(timestamp string) MsgOption {
 	return func(config *sendConfig) error {
-		config.mode = chatDelete
+		config.endpoint = SLACK_API + string(chatDelete)
 		config.values.Add("ts", timestamp)
 		return nil
 	}
@@ -297,7 +295,7 @@ func MsgOptionUser(userID string) MsgOption {
 func MsgOptionText(text string, escape bool) MsgOption {
 	return func(config *sendConfig) error {
 		if escape {
-			text = escapeMessage(text)
+			text = slackutilsx.EscapeMessage(text)
 		}
 		config.values.Add("text", text)
 		return nil
@@ -392,6 +390,18 @@ func MsgOptionParse(b bool) MsgOption {
 	}
 }
 
+// UnsafeMsgOptionEndpoint deliver the message to the specified endpoint.
+// NOTE: USE AT YOUR OWN RISK: No issues relating to the use of this Option
+// will be supported by the library, it is subject to change without notice that
+// may result in compilation errors or runtime behaviour changes.
+func UnsafeMsgOptionEndpoint(endpoint string, update func(url.Values)) MsgOption {
+	return func(config *sendConfig) error {
+		config.endpoint = endpoint
+		update(config.values)
+		return nil
+	}
+}
+
 // MsgOptionPostMessageParameters maintain backwards compatibility.
 func MsgOptionPostMessageParameters(params PostMessageParameters) MsgOption {
 	return func(config *sendConfig) error {
diff --git a/vendor/github.com/nlopes/slack/conversation.go b/vendor/github.com/nlopes/slack/conversation.go
index edde87a2..1c64116e 100644
--- a/vendor/github.com/nlopes/slack/conversation.go
+++ b/vendor/github.com/nlopes/slack/conversation.go
@@ -29,6 +29,8 @@ type conversation struct {
 	NameNormalized     string   `json:"name_normalized"`
 	NumMembers         int      `json:"num_members"`
 	Priority           float64  `json:"priority"`
+	User               string   `json:"user"`
+
 	// TODO support pending_shared
 	// TODO support previous_names
 }
@@ -64,6 +66,13 @@ type GetUsersInConversationParameters struct {
 	Limit     int
 }
 
+type GetConversationsForUserParameters struct {
+	UserID string
+	Cursor string
+	Types  []string
+	Limit  int
+}
+
 type responseMetaData struct {
 	NextCursor string `json:"next_cursor"`
 }
@@ -100,6 +109,41 @@ func (api *Client) GetUsersInConversationContext(ctx context.Context, params *Ge
 	return response.Members, response.ResponseMetaData.NextCursor, nil
 }
 
+// GetConversationsForUser returns the list conversations for a given user
+func (api *Client) GetConversationsForUser(params *GetConversationsForUserParameters) (channels []Channel, nextCursor string, err error) {
+	return api.GetConversationsForUserContext(context.Background(), params)
+}
+
+// GetConversationsForUserContext returns the list conversations for a given user with a custom context
+func (api *Client) GetConversationsForUserContext(ctx context.Context, params *GetConversationsForUserParameters) (channels []Channel, nextCursor string, err error) {
+	values := url.Values{
+		"token": {api.token},
+		"user":  {params.UserID},
+	}
+	if params.Cursor != "" {
+		values.Add("cursor", params.Cursor)
+	}
+	if params.Limit != 0 {
+		values.Add("limit", strconv.Itoa(params.Limit))
+	}
+	if params.Types != nil {
+		values.Add("types", strings.Join(params.Types, ","))
+	}
+	response := struct {
+		Channels         []Channel        `json:"channels"`
+		ResponseMetaData responseMetaData `json:"response_metadata"`
+		SlackResponse
+	}{}
+	err = postSlackMethod(ctx, api.httpclient, "users.conversations", values, &response, api.debug)
+	if err != nil {
+		return nil, "", err
+	}
+	if !response.Ok {
+		return nil, "", errors.New(response.Error)
+	}
+	return response.Channels, response.ResponseMetaData.NextCursor, nil
+}
+
 // ArchiveConversation archives a conversation
 func (api *Client) ArchiveConversation(channelID string) error {
 	return api.ArchiveConversationContext(context.Background(), channelID)
diff --git a/vendor/github.com/nlopes/slack/dialog.go b/vendor/github.com/nlopes/slack/dialog.go
index a13e53da..d1435d54 100644
--- a/vendor/github.com/nlopes/slack/dialog.go
+++ b/vendor/github.com/nlopes/slack/dialog.go
@@ -6,52 +6,47 @@ import (
 	"errors"
 )
 
+// InputType is the type of the dialog input type
+type InputType string
+
+const (
+	// InputTypeText textfield input
+	InputTypeText InputType = "text"
+	// InputTypeTextArea textarea input
+	InputTypeTextArea InputType = "textarea"
+	// InputTypeSelect textfield input
+	InputTypeSelect InputType = "select"
+)
+
+// DialogInput for dialogs input type text or menu
+type DialogInput struct {
+	Type        InputType `json:"type"`
+	Label       string    `json:"label"`
+	Name        string    `json:"name"`
+	Placeholder string    `json:"placeholder"`
+	Optional    bool      `json:"optional"`
+}
+
+// DialogTrigger ...
 type DialogTrigger struct {
-	TriggerId string `json:"trigger_id"` //Required. Must respond within 3 seconds.
+	TriggerID string `json:"trigger_id"` //Required. Must respond within 3 seconds.
 	Dialog    Dialog `json:"dialog"`     //Required.
 }
 
+// Dialog as in Slack dialogs
+// https://api.slack.com/dialogs#option_element_attributes#top-level_dialog_attributes
 type Dialog struct {
-	CallbackId     string          `json:"callback_id"`                //Required.
-	Title          string          `json:"title"`                      //Required.
-	SubmitLabel    string          `json:"submit_label,omitempty"`     //Optional. Default value is 'Submit'
-	NotifyOnCancel bool            `json:"notify_on_cancel,omitempty"` //Optional. Default value is false
-	Elements       []DialogElement `json:"elements"`                   //Required.
+	TriggerID      string          `json:"trigger_id"`  //Required
+	CallbackID     string          `json:"callback_id"` //Required
+	Title          string          `json:"title"`
+	SubmitLabel    string          `json:"submit_label,omitempty"`
+	NotifyOnCancel bool            `json:"notify_on_cancel"`
+	Elements       []DialogElement `json:"elements"`
 }
 
+// DialogElement abstract type for dialogs.
 type DialogElement interface{}
 
-type DialogTextElement struct {
-	Label       string `json:"label"`                 //Required.
-	Name        string `json:"name"`                  //Required.
-	Type        string `json:"type"`                  //Required. Allowed values: "text", "textarea", "select".
-	Placeholder string `json:"placeholder,omitempty"` //Optional.
-	Optional    bool   `json:"optional,omitempty"`    //Optional. Default value is false
-	Value       string `json:"value,omitempty"`       //Optional.
-	MaxLength   int    `json:"max_length,omitempty"`  //Optional.
-	MinLength   int    `json:"min_length,omitempty"`  //Optional,. Default value is 0
-	Hint        string `json:"hint,omitempty"`        //Optional.
-	Subtype     string `json:"subtype,omitempty"`     //Optional. Allowed values: "email", "number", "tel", "url".
-}
-
-type DialogSelectElement struct {
-	Label           string                `json:"label"`                      //Required.
-	Name            string                `json:"name"`                       //Required.
-	Type            string                `json:"type"`                       //Required. Allowed values: "text", "textarea", "select".
-	Placeholder     string                `json:"placeholder,omitempty"`      //Optional.
-	Optional        bool                  `json:"optional,omitempty"`         //Optional. Default value is false
-	Value           string                `json:"value,omitempty"`            //Optional.
-	DataSource      string                `json:"data_source,omitempty"`      //Optional. Allowed values: "users", "channels", "conversations", "external".
-	SelectedOptions string                `json:"selected_options,omitempty"` //Optional. Default value for "external" only
-	Options         []DialogElementOption `json:"options,omitempty"`          //One of options or option_groups is required.
-	OptionGroups    []DialogElementOption `json:"option_groups,omitempty"`    //Provide up to 100 options.
-}
-
-type DialogElementOption struct {
-	Label string `json:"label"` //Required.
-	Value string `json:"value"` //Required.
-}
-
 // DialogCallback is sent from Slack when a user submits a form from within a dialog
 type DialogCallback struct {
 	Type        string            `json:"type"`
@@ -78,28 +73,43 @@ type DialogSuggestionCallback struct {
 	CallbackID  string  `json:"callback_id"`
 }
 
-// OpenDialog opens a dialog window where the triggerId originated from
-func (api *Client) OpenDialog(triggerId string, dialog Dialog) (err error) {
-	return api.OpenDialogContext(context.Background(), triggerId, dialog)
+// DialogOpenResponse response from `dialog.open`
+type DialogOpenResponse struct {
+	SlackResponse
+	DialogResponseMetadata DialogResponseMetadata `json:"response_metadata"`
+}
+
+// DialogResponseMetadata lists the error messages
+type DialogResponseMetadata struct {
+	Messages []string `json:"messages"`
+}
+
+// OpenDialog opens a dialog window where the triggerID originated from.
+// EXPERIMENTAL: dialog functionality is currently experimental, api is not considered stable.
+func (api *Client) OpenDialog(triggerID string, dialog Dialog) (err error) {
+	return api.OpenDialogContext(context.Background(), triggerID, dialog)
 }
 
 // OpenDialogContext opens a dialog window where the triggerId originated from with a custom context
-func (api *Client) OpenDialogContext(ctx context.Context, triggerId string, dialog Dialog) (err error) {
-	if triggerId == "" {
+// EXPERIMENTAL: dialog functionality is currently experimental, api is not considered stable.
+func (api *Client) OpenDialogContext(ctx context.Context, triggerID string, dialog Dialog) (err error) {
+	if triggerID == "" {
 		return errors.New("received empty parameters")
 	}
 
-	resp := DialogTrigger{
-		TriggerId: triggerId,
+	req := DialogTrigger{
+		TriggerID: triggerID,
 		Dialog:    dialog,
 	}
-	jsonResp, err := json.Marshal(resp)
+
+	encoded, err := json.Marshal(req)
 	if err != nil {
 		return err
 	}
-	response := &SlackResponse{}
+
+	response := &DialogOpenResponse{}
 	endpoint := SLACK_API + "dialog.open"
-	if err := postJSON(ctx, api.httpclient, endpoint, api.token, jsonResp, response, api.debug); err != nil {
+	if err := postJSON(ctx, api.httpclient, endpoint, api.token, encoded, response, api.debug); err != nil {
 		return err
 	}
 
diff --git a/vendor/github.com/nlopes/slack/dialog_select.go b/vendor/github.com/nlopes/slack/dialog_select.go
new file mode 100644
index 00000000..cff35479
--- /dev/null
+++ b/vendor/github.com/nlopes/slack/dialog_select.go
@@ -0,0 +1,125 @@
+package slack
+
+// SelectDataSource types of select datasource
+type SelectDataSource string
+
+const (
+	// DialogDataSourceStatic menu with static Options/OptionGroups
+	DialogDataSourceStatic SelectDataSource = "static"
+	// DialogDataSourceExternal dynamic datasource
+	DialogDataSourceExternal SelectDataSource = "external"
+	// DialogDataSourceConversations provides a list of conversations
+	DialogDataSourceConversations SelectDataSource = "conversations"
+	// DialogDataSourceChannels provides a list of channels
+	DialogDataSourceChannels SelectDataSource = "channels"
+	// DialogDataSourceUsers provides a list of users
+	DialogDataSourceUsers SelectDataSource = "users"
+)
+
+// DialogInputSelect dialog support for select boxes.
+type DialogInputSelect struct {
+	DialogInput
+	Value           string               `json:"value,omitempty"`            //Optional.
+	DataSource      SelectDataSource     `json:"data_source,omitempty"`      //Optional. Allowed values: "users", "channels", "conversations", "external".
+	SelectedOptions string               `json:"selected_options,omitempty"` //Optional. Default value for "external" only
+	Options         []DialogSelectOption `json:"options,omitempty"`          //One of options or option_groups is required.
+	OptionGroups    []DialogOptionGroup  `json:"option_groups,omitempty"`    //Provide up to 100 options.
+}
+
+// DialogSelectOption is an option for the user to select from the menu
+type DialogSelectOption struct {
+	Label string `json:"label"`
+	Value string `json:"value"`
+}
+
+// DialogOptionGroup is a collection of options for creating a segmented table
+type DialogOptionGroup struct {
+	Label   string               `json:"label"`
+	Options []DialogSelectOption `json:"options"`
+}
+
+// NewStaticSelectDialogInput constructor for a `static` datasource menu input
+func NewStaticSelectDialogInput(name, label string, options []DialogSelectOption) *DialogInputSelect {
+	return &DialogInputSelect{
+		DialogInput: DialogInput{
+			Type:     InputTypeSelect,
+			Name:     name,
+			Label:    label,
+			Optional: true,
+		},
+		DataSource: DialogDataSourceStatic,
+		Options:    options,
+	}
+}
+
+// NewGroupedSelectDialogInput creates grouped options select input for Dialogs.
+func NewGroupedSelectDialogInput(name, label string, groups map[string]map[string]string) *DialogInputSelect {
+	optionGroups := []DialogOptionGroup{}
+	for groupName, options := range groups {
+		optionGroups = append(optionGroups, DialogOptionGroup{
+			Label:   groupName,
+			Options: optionsFromMap(options),
+		})
+	}
+	return &DialogInputSelect{
+		DialogInput: DialogInput{
+			Type:  InputTypeSelect,
+			Name:  name,
+			Label: label,
+		},
+		DataSource:   DialogDataSourceStatic,
+		OptionGroups: optionGroups,
+	}
+}
+
+func optionsFromArray(options []string) []DialogSelectOption {
+	selectOptions := make([]DialogSelectOption, len(options))
+	for idx, value := range options {
+		selectOptions[idx] = DialogSelectOption{
+			Label: value,
+			Value: value,
+		}
+	}
+	return selectOptions
+}
+
+func optionsFromMap(options map[string]string) []DialogSelectOption {
+	selectOptions := make([]DialogSelectOption, len(options))
+	idx := 0
+	var option DialogSelectOption
+	for key, value := range options {
+		option = DialogSelectOption{
+			Label: key,
+			Value: value,
+		}
+		selectOptions[idx] = option
+		idx++
+	}
+	return selectOptions
+}
+
+// NewConversationsSelect returns a `Conversations` select
+func NewConversationsSelect(name, label string) *DialogInputSelect {
+	return newPresetSelect(name, label, DialogDataSourceConversations)
+}
+
+// NewChannelsSelect returns a `Channels` select
+func NewChannelsSelect(name, label string) *DialogInputSelect {
+	return newPresetSelect(name, label, DialogDataSourceChannels)
+}
+
+// NewUsersSelect returns a `Users` select
+func NewUsersSelect(name, label string) *DialogInputSelect {
+	return newPresetSelect(name, label, DialogDataSourceUsers)
+}
+
+func newPresetSelect(name, label string, dataSourceType SelectDataSource) *DialogInputSelect {
+	return &DialogInputSelect{
+		DialogInput: DialogInput{
+			Type:  InputTypeSelect,
+			Label: label,
+			Name:  name,
+		},
+		DataSource: dataSourceType,
+	}
+}
diff --git a/vendor/github.com/nlopes/slack/dialog_text.go b/vendor/github.com/nlopes/slack/dialog_text.go
new file mode 100644
index 00000000..bf9602cc
--- /dev/null
+++ b/vendor/github.com/nlopes/slack/dialog_text.go
@@ -0,0 +1,50 @@
+package slack
+
+// TextInputSubtype Accepts email, number, tel, or url. In some form factors, optimized input is provided for this subtype.
+type TextInputSubtype string
+
+const (
+	// InputSubtypeEmail email keyboard
+	InputSubtypeEmail TextInputSubtype = "email"
+	// InputSubtypeNumber numeric keyboard
+	InputSubtypeNumber TextInputSubtype = "number"
+	// InputSubtypeTel Phone keyboard
+	InputSubtypeTel TextInputSubtype = "tel"
+	// InputSubtypeURL Phone keyboard
+	InputSubtypeURL TextInputSubtype = "url"
+)
+
+// TextInputElement subtype of DialogInput
+//	https://api.slack.com/dialogs#option_element_attributes#text_element_attributes
+type TextInputElement struct {
+	DialogInput
+	MaxLength int              `json:"max_length,omitempty"`
+	MinLength int              `json:"min_length,omitempty"`
+	Hint      string           `json:"hint,omitempty"`
+	Subtype   TextInputSubtype `json:"subtype"`
+	Value     string           `json:"value"`
+}
+
+// NewTextInput constructor for a `text` input
+func NewTextInput(name, label, text string) *TextInputElement {
+	return &TextInputElement{
+		DialogInput: DialogInput{
+			Type:  InputTypeText,
+			Name:  name,
+			Label: label,
+		},
+		Value: text,
+	}
+}
+
+// NewTextAreaInput constructor for a `textarea` input
+func NewTextAreaInput(name, label, text string) *TextInputElement {
+	return &TextInputElement{
+		DialogInput: DialogInput{
+			Type:  InputTypeTextArea,
+			Name:  name,
+			Label: label,
+		},
+		Value: text,
+	}
+}
diff --git a/vendor/github.com/nlopes/slack/files.go b/vendor/github.com/nlopes/slack/files.go
index 2381ec3c..0550c9fb 100644
--- a/vendor/github.com/nlopes/slack/files.go
+++ b/vendor/github.com/nlopes/slack/files.go
@@ -93,14 +93,15 @@ type File struct {
 // 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
+	File            string
+	Content         string
+	Reader          io.Reader
+	Filetype        string
+	Filename        string
+	Title           string
+	InitialComment  string
+	Channels        []string
+	ThreadTimestamp string
 }
 
 // GetFilesParameters contains all the parameters necessary (including the optional ones) for a GetFiles() request
@@ -237,6 +238,9 @@ func (api *Client) UploadFileContext(ctx context.Context, params FileUploadParam
 	if params.InitialComment != "" {
 		values.Add("initial_comment", params.InitialComment)
 	}
+	if params.ThreadTimestamp != "" {
+		values.Add("thread_ts", params.ThreadTimestamp)
+	}
 	if len(params.Channels) != 0 {
 		values.Add("channels", strings.Join(params.Channels, ","))
 	}
diff --git a/vendor/github.com/nlopes/slack/security.go b/vendor/github.com/nlopes/slack/security.go
new file mode 100644
index 00000000..50201d99
--- /dev/null
+++ b/vendor/github.com/nlopes/slack/security.go
@@ -0,0 +1,47 @@
+package slack

+

+import (

+	"crypto/hmac"

+	"crypto/sha256"

+	"encoding/hex"

+	"errors"

+	"fmt"

+	"hash"

+	"net/http"

+)

+

+// SecretsVerifier contains the information needed to verify that the request comes from Slack

+type SecretsVerifier struct {

+	slackSig  string

+	timeStamp string

+	hmac      hash.Hash

+}

+

+// NewSecretsVerifier returns a SecretsVerifier object in exchange for an http.Header object and signing secret

+func NewSecretsVerifier(header http.Header, signingSecret string) (SecretsVerifier, error) {

+	if header["X-Slack-Signature"][0] == "" || header["X-Slack-Request-Timestamp"][0] == "" {

+		return SecretsVerifier{}, errors.New("Headers are empty, cannot create SecretsVerifier")

+	}

+

+	hash := hmac.New(sha256.New, []byte(signingSecret))

+	hash.Write([]byte(fmt.Sprintf("v0:%s:", header["X-Slack-Request-Timestamp"][0])))

+	return SecretsVerifier{

+		slackSig:  header["X-Slack-Signature"][0],

+		timeStamp: header["X-Slack-Request-Timestamp"][0],

+		hmac:      hash,

+	}, nil

+}

+

+func (v *SecretsVerifier) Write(body []byte) (n int, err error) {

+	return v.hmac.Write(body)

+}

+

+// Ensure compares the signature sent from Slack with the actual computed hash to judge validity

+func (v SecretsVerifier) Ensure() error {

+	computed := "v0=" + string(hex.EncodeToString(v.hmac.Sum(nil)))

+	if computed == v.slackSig {

+		return nil

+	}

+

+	return fmt.Errorf("Expected signing signature: %s, but computed: %s", v.slackSig, computed)

+}

diff --git a/vendor/github.com/nlopes/slack/slackutilsx/slackutilsx.go b/vendor/github.com/nlopes/slack/slackutilsx/slackutilsx.go
new file mode 100644
index 00000000..ccf5372b
--- /dev/null
+++ b/vendor/github.com/nlopes/slack/slackutilsx/slackutilsx.go
@@ -0,0 +1,57 @@
+// Package slackutilsx is a utility package that doesn't promise API stability.
+// its for experimental functionality and utilities.
+package slackutilsx
+
+import (
+	"strings"
+	"unicode/utf8"
+)
+
+// ChannelType the type of channel based on the channelID
+type ChannelType int
+
+func (t ChannelType) String() string {
+	switch t {
+	case CTypeDM:
+		return "Direct"
+	case CTypeGroup:
+		return "Group"
+	case CTypeChannel:
+		return "Channel"
+	default:
+		return "Unknown"
+	}
+}
+
+const (
+	// CTypeUnknown represents channels we cannot properly detect.
+	CTypeUnknown ChannelType = iota
+	// CTypeDM is a private channel between two slack users.
+	CTypeDM
+	// CTypeGroup is a group channel.
+	CTypeGroup
+	// CTypeChannel is a public channel.
+	CTypeChannel
+)
+
+// DetectChannelType converts a channelID to a ChannelType.
+// channelID must not be empty. However, if it is empty, the channel type will default to Unknown.
+func DetectChannelType(channelID string) ChannelType {
+	// intentionally ignore the error and just default to CTypeUnknown
+	switch r, _ := utf8.DecodeRuneInString(channelID); r {
+	case 'C':
+		return CTypeChannel
+	case 'G':
+		return CTypeGroup
+	case 'D':
+		return CTypeDM
+	default:
+		return CTypeUnknown
+	}
+}
+
+// EscapeMessage text
+func EscapeMessage(message string) string {
+	replacer := strings.NewReplacer("&", "&amp;", "<", "&lt;", ">", "&gt;")
+	return replacer.Replace(message)
+}
diff --git a/vendor/github.com/nlopes/slack/usergroups.go b/vendor/github.com/nlopes/slack/usergroups.go
index 1e2b6442..cc9bc4ca 100644
--- a/vendor/github.com/nlopes/slack/usergroups.go
+++ b/vendor/github.com/nlopes/slack/usergroups.go
@@ -25,6 +25,7 @@ type UserGroup struct {
 	DeletedBy   string         `json:"deleted_by"`
 	Prefs       UserGroupPrefs `json:"prefs"`
 	UserCount   int            `json:"user_count"`
+	Users       []string       `json:"users"`
 }
 
 // UserGroupPrefs contains default channels and groups (private channels)
@@ -121,16 +122,62 @@ func (api *Client) EnableUserGroupContext(ctx context.Context, userGroup string)
 	return response.UserGroup, nil
 }
 
+// GetUserGroupsOption options for the GetUserGroups method call.
+type GetUserGroupsOption func(*GetUserGroupsParams)
+
+// GetUserGroupsOptionIncludeCount include the number of users in each User Group (default: false)
+func GetUserGroupsOptionIncludeCount(b bool) GetUserGroupsOption {
+	return func(params *GetUserGroupsParams) {
+		params.IncludeCount = b
+	}
+}
+
+// GetUserGroupsOptionIncludeDisabled include disabled User Groups (default: false)
+func GetUserGroupsOptionIncludeDisabled(b bool) GetUserGroupsOption {
+	return func(params *GetUserGroupsParams) {
+		params.IncludeDisabled = b
+	}
+}
+
+// GetUserGroupsOptionIncludeUsers include the list of users for each User Group (default: false)
+func GetUserGroupsOptionIncludeUsers(b bool) GetUserGroupsOption {
+	return func(params *GetUserGroupsParams) {
+		params.IncludeUsers = b
+	}
+}
+
+// GetUserGroupsParams contains arguments for GetUserGroups method call
+type GetUserGroupsParams struct {
+	IncludeCount    bool
+	IncludeDisabled bool
+	IncludeUsers    bool
+}
+
 // GetUserGroups returns a list of user groups for the team
-func (api *Client) GetUserGroups() ([]UserGroup, error) {
-	return api.GetUserGroupsContext(context.Background())
+func (api *Client) GetUserGroups(options ...GetUserGroupsOption) ([]UserGroup, error) {
+	return api.GetUserGroupsContext(context.Background(), options...)
 }
 
 // GetUserGroupsContext returns a list of user groups for the team with a custom context
-func (api *Client) GetUserGroupsContext(ctx context.Context) ([]UserGroup, error) {
+func (api *Client) GetUserGroupsContext(ctx context.Context, options ...GetUserGroupsOption) ([]UserGroup, error) {
+	params := GetUserGroupsParams{}
+
+	for _, opt := range options {
+		opt(&params)
+	}
+
 	values := url.Values{
 		"token": {api.token},
 	}
+	if params.IncludeCount {
+		values.Add("include_count", "true")
+	}
+	if params.IncludeDisabled {
+		values.Add("include_disabled", "true")
+	}
+	if params.IncludeUsers {
+		values.Add("include_users", "true")
+	}
 
 	response, err := userGroupRequest(ctx, api.httpclient, "usergroups.list", values, api.debug)
 	if err != nil {
diff --git a/vendor/github.com/nlopes/slack/webhooks.go b/vendor/github.com/nlopes/slack/webhooks.go
index 870a8d8b..3ea69ffe 100644
--- a/vendor/github.com/nlopes/slack/webhooks.go
+++ b/vendor/github.com/nlopes/slack/webhooks.go
@@ -1,15 +1,16 @@
 package slack
 
 import (
-	"github.com/pkg/errors"
-	"net/http"
 	"bytes"
 	"encoding/json"
+	"net/http"
+
+	"github.com/pkg/errors"
 )
 
 type WebhookMessage struct {
-	Text    		string 				`json:"text,omitempty"`
-	Attachments []Attachment	`json:"attachments,omitempty"`
+	Text        string       `json:"text,omitempty"`
+	Attachments []Attachment `json:"attachments,omitempty"`
 }
 
 func PostWebhook(url string, msg *WebhookMessage) error {
@@ -19,7 +20,7 @@ func PostWebhook(url string, msg *WebhookMessage) error {
 		return errors.Wrap(err, "marshal failed")
 	}
 
-	response, err := http.Post(url, "application/json", bytes.NewReader(raw));
+	response, err := http.Post(url, "application/json", bytes.NewReader(raw))
 
 	if err != nil {
 		return errors.Wrap(err, "failed to post webhook")
diff --git a/vendor/github.com/nlopes/slack/websocket_managed_conn.go b/vendor/github.com/nlopes/slack/websocket_managed_conn.go
index b6d1bfc8..e8ab65a1 100644
--- a/vendor/github.com/nlopes/slack/websocket_managed_conn.go
+++ b/vendor/github.com/nlopes/slack/websocket_managed_conn.go
@@ -524,4 +524,9 @@ var EventMapping = map[string]interface{}{
 
 	"member_joined_channel": MemberJoinedChannelEvent{},
 	"member_left_channel":   MemberLeftChannelEvent{},
+
+	"subteam_created":      SubteamCreatedEvent{},
+	"subteam_self_added":   SubteamSelfAddedEvent{},
+	"subteam_self_removed": SubteamSelfRemovedEvent{},
+	"subteam_updated":      SubteamUpdatedEvent{},
 }
diff --git a/vendor/github.com/nlopes/slack/websocket_subteam.go b/vendor/github.com/nlopes/slack/websocket_subteam.go
new file mode 100644
index 00000000..a23b274c
--- /dev/null
+++ b/vendor/github.com/nlopes/slack/websocket_subteam.go
@@ -0,0 +1,35 @@
+package slack
+
+// SubteamCreatedEvent represents the Subteam created event
+type SubteamCreatedEvent struct {
+	Type    string    `json:"type"`
+	Subteam UserGroup `json:"subteam"`
+}
+
+// SubteamCreatedEvent represents the membership of an existing User Group has changed event
+type SubteamMembersChangedEvent struct {
+	Type               string   `json:"type"`
+	SubteamID          string   `json:"subteam_id"`
+	TeamID             string   `json:"team_id"`
+	DatePreviousUpdate JSONTime `json:"date_previous_update"`
+	DateUpdate         JSONTime `json:"date_update"`
+	AddedUsers         []string `json:"added_users"`
+	AddedUsersCount    string   `json:"added_users_count"`
+	RemovedUsers       []string `json:"removed_users"`
+	RemovedUsersCount  string   `json:"removed_users_count"`
+}
+
+// SubteamSelfAddedEvent represents an event of you have been added to a User Group
+type SubteamSelfAddedEvent struct {
+	Type      string `json:"type"`
+	SubteamID string `json:"subteam_id"`
+}
+
+// SubteamSelfRemovedEvent represents an event of you have been removed from a User Group
+type SubteamSelfRemovedEvent SubteamSelfAddedEvent
+
+// SubteamUpdatedEvent represents an event of an existing User Group has been updated or its members changed
+type SubteamUpdatedEvent struct {
+	Type    string    `json:"type"`
+	Subteam UserGroup `json:"subteam"`
+}
diff --git a/vendor/github.com/pelletier/go-toml/benchmark.toml b/vendor/github.com/pelletier/go-toml/benchmark.toml
new file mode 100644
index 00000000..dfd77e09
--- /dev/null
+++ b/vendor/github.com/pelletier/go-toml/benchmark.toml
@@ -0,0 +1,244 @@
+################################################################################
+## Comment
+
+# Speak your mind with the hash symbol. They go from the symbol to the end of
+# the line.
+
+
+################################################################################
+## Table
+
+# Tables (also known as hash tables or dictionaries) are collections of
+# key/value pairs. They appear in square brackets on a line by themselves.
+
+[table]
+
+key = "value" # Yeah, you can do this.
+
+# Nested tables are denoted by table names with dots in them. Name your tables
+# whatever crap you please, just don't use #, ., [ or ].
+
+[table.subtable]
+
+key = "another value"
+
+# You don't need to specify all the super-tables if you don't want to. TOML
+# knows how to do it for you.
+
+# [x] you
+# [x.y] don't
+# [x.y.z] need these
+[x.y.z.w] # for this to work
+
+
+################################################################################
+## Inline Table
+
+# Inline tables provide a more compact syntax for expressing tables. They are
+# especially useful for grouped data that can otherwise quickly become verbose.
+# Inline tables are enclosed in curly braces `{` and `}`. No newlines are
+# allowed between the curly braces unless they are valid within a value.
+
+[table.inline]
+
+name = { first = "Tom", last = "Preston-Werner" }
+point = { x = 1, y = 2 }
+
+
+################################################################################
+## String
+
+# There are four ways to express strings: basic, multi-line basic, literal, and
+# multi-line literal. All strings must contain only valid UTF-8 characters.
+
+[string.basic]
+
+basic = "I'm a string. \"You can quote me\". Name\tJos\u00E9\nLocation\tSF."
+
+[string.multiline]
+
+# The following strings are byte-for-byte equivalent:
+key1 = "One\nTwo"
+key2 = """One\nTwo"""
+key3 = """
+One
+Two"""
+
+[string.multiline.continued]
+
+# The following strings are byte-for-byte equivalent:
+key1 = "The quick brown fox jumps over the lazy dog."
+
+key2 = """
+The quick brown \
+
+
+  fox jumps over \
+    the lazy dog."""
+
+key3 = """\
+       The quick brown \
+       fox jumps over \
+       the lazy dog.\
+       """
+
+[string.literal]
+
+# What you see is what you get.
+winpath  = 'C:\Users\nodejs\templates'
+winpath2 = '\\ServerX\admin$\system32\'
+quoted   = 'Tom "Dubs" Preston-Werner'
+regex    = '<\i\c*\s*>'
+
+
+[string.literal.multiline]
+
+regex2 = '''I [dw]on't need \d{2} apples'''
+lines  = '''
+The first newline is
+trimmed in raw strings.
+   All other whitespace
+   is preserved.
+'''
+
+
+################################################################################
+## Integer
+
+# Integers are whole numbers. Positive numbers may be prefixed with a plus sign.
+# Negative numbers are prefixed with a minus sign.
+
+[integer]
+
+key1 = +99
+key2 = 42
+key3 = 0
+key4 = -17
+
+[integer.underscores]
+
+# For large numbers, you may use underscores to enhance readability. Each
+# underscore must be surrounded by at least one digit.
+key1 = 1_000
+key2 = 5_349_221
+key3 = 1_2_3_4_5     # valid but inadvisable
+
+
+################################################################################
+## Float
+
+# A float consists of an integer part (which may be prefixed with a plus or
+# minus sign) followed by a fractional part and/or an exponent part.
+
+[float.fractional]
+
+key1 = +1.0
+key2 = 3.1415
+key3 = -0.01
+
+[float.exponent]
+
+key1 = 5e+22
+key2 = 1e6
+key3 = -2E-2
+
+[float.both]
+
+key = 6.626e-34
+
+[float.underscores]
+
+key1 = 9_224_617.445_991_228_313
+key2 = 1e1_00
+
+
+################################################################################
+## Boolean
+
+# Booleans are just the tokens you're used to. Always lowercase.
+
+[boolean]
+
+True = true
+False = false
+
+
+################################################################################
+## Datetime
+
+# Datetimes are RFC 3339 dates.
+
+[datetime]
+
+key1 = 1979-05-27T07:32:00Z
+key2 = 1979-05-27T00:32:00-07:00
+key3 = 1979-05-27T00:32:00.999999-07:00
+
+
+################################################################################
+## Array
+
+# Arrays are square brackets with other primitives inside. Whitespace is
+# ignored. Elements are separated by commas. Data types may not be mixed.
+
+[array]
+
+key1 = [ 1, 2, 3 ]
+key2 = [ "red", "yellow", "green" ]
+key3 = [ [ 1, 2 ], [3, 4, 5] ]
+#key4 = [ [ 1, 2 ], ["a", "b", "c"] ] # this is ok
+
+# Arrays can also be multiline. So in addition to ignoring whitespace, arrays
+# also ignore newlines between the brackets.  Terminating commas are ok before
+# the closing bracket.
+
+key5 = [
+  1, 2, 3
+]
+key6 = [
+  1,
+  2, # this is ok
+]
+
+
+################################################################################
+## Array of Tables
+
+# These can be expressed by using a table name in double brackets. Each table
+# with the same double bracketed name will be an element in the array. The
+# tables are inserted in the order encountered.
+
+[[products]]
+
+name = "Hammer"
+sku = 738594937
+
+[[products]]
+
+[[products]]
+
+name = "Nail"
+sku = 284758393
+color = "gray"
+
+
+# You can create nested arrays of tables as well.
+
+[[fruit]]
+  name = "apple"
+
+  [fruit.physical]
+    color = "red"
+    shape = "round"
+
+  [[fruit.variety]]
+    name = "red delicious"
+
+  [[fruit.variety]]
+    name = "granny smith"
+
+[[fruit]]
+  name = "banana"
+
+  [[fruit.variety]]
+    name = "plantain"
diff --git a/vendor/github.com/pelletier/go-toml/example-crlf.toml b/vendor/github.com/pelletier/go-toml/example-crlf.toml
new file mode 100644
index 00000000..12950a16
--- /dev/null
+++ b/vendor/github.com/pelletier/go-toml/example-crlf.toml
@@ -0,0 +1,29 @@
+# This is a TOML document. Boom.

+

+title = "TOML Example"

+

+[owner]

+name = "Tom Preston-Werner"

+organization = "GitHub"

+bio = "GitHub Cofounder & CEO\nLikes tater tots and beer."

+dob = 1979-05-27T07:32:00Z # First class dates? Why not?

+

+[database]

+server = "192.168.1.1"

+ports = [ 8001, 8001, 8002 ]

+connection_max = 5000

+enabled = true

+

+[servers]

+

+  # You can indent as you please. Tabs or spaces. TOML don't care.

+  [servers.alpha]

+  ip = "10.0.0.1"

+  dc = "eqdc10"

+

+  [servers.beta]

+  ip = "10.0.0.2"

+  dc = "eqdc10"

+

+[clients]

+data = [ ["gamma", "delta"], [1, 2] ] # just an update to make sure parsers support it

diff --git a/vendor/github.com/pelletier/go-toml/example.toml b/vendor/github.com/pelletier/go-toml/example.toml
new file mode 100644
index 00000000..3d902f28
--- /dev/null
+++ b/vendor/github.com/pelletier/go-toml/example.toml
@@ -0,0 +1,29 @@
+# This is a TOML document. Boom.
+
+title = "TOML Example"
+
+[owner]
+name = "Tom Preston-Werner"
+organization = "GitHub"
+bio = "GitHub Cofounder & CEO\nLikes tater tots and beer."
+dob = 1979-05-27T07:32:00Z # First class dates? Why not?
+
+[database]
+server = "192.168.1.1"
+ports = [ 8001, 8001, 8002 ]
+connection_max = 5000
+enabled = true
+
+[servers]
+
+  # You can indent as you please. Tabs or spaces. TOML don't care.
+  [servers.alpha]
+  ip = "10.0.0.1"
+  dc = "eqdc10"
+
+  [servers.beta]
+  ip = "10.0.0.2"
+  dc = "eqdc10"
+
+[clients]
+data = [ ["gamma", "delta"], [1, 2] ] # just an update to make sure parsers support it
diff --git a/vendor/github.com/pelletier/go-toml/marshal_test.toml b/vendor/github.com/pelletier/go-toml/marshal_test.toml
new file mode 100644
index 00000000..1c5f98e7
--- /dev/null
+++ b/vendor/github.com/pelletier/go-toml/marshal_test.toml
@@ -0,0 +1,38 @@
+title = "TOML Marshal Testing"
+
+[basic]
+  bool = true
+  date = 1979-05-27T07:32:00Z
+  float = 123.4
+  int = 5000
+  string = "Bite me"
+  uint = 5001
+
+[basic_lists]
+  bools = [true,false,true]
+  dates = [1979-05-27T07:32:00Z,1980-05-27T07:32:00Z]
+  floats = [12.3,45.6,78.9]
+  ints = [8001,8001,8002]
+  strings = ["One","Two","Three"]
+  uints = [5002,5003]
+
+[basic_map]
+  one = "one"
+  two = "two"
+
+[subdoc]
+
+  [subdoc.first]
+    name = "First"
+
+  [subdoc.second]
+    name = "Second"
+
+[[subdoclist]]
+  name = "List.First"
+
+[[subdoclist]]
+  name = "List.Second"
+
+[[subdocptrs]]
+  name = "Second"
diff --git a/vendor/modules.txt b/vendor/modules.txt
index c95b593e..9a59b2ce 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -95,8 +95,9 @@ github.com/nicksnyder/go-i18n/i18n
 github.com/nicksnyder/go-i18n/i18n/bundle
 github.com/nicksnyder/go-i18n/i18n/language
 github.com/nicksnyder/go-i18n/i18n/translation
-# github.com/nlopes/slack v0.3.1-0.20180805133408-21749ab136a8
+# github.com/nlopes/slack v0.4.0
 github.com/nlopes/slack
+github.com/nlopes/slack/slackutilsx
 # github.com/paulrosania/go-charset v0.0.0-20151028000031-621bb39fcc83
 github.com/paulrosania/go-charset/charset
 github.com/paulrosania/go-charset/data