Use upstream slack-go/slack again (#1018)

85 files changed, 496 insertions, 100 deletions

diff --git a/vendor/github.com/nlopes/slack/block_unknown.go b/vendor/github.com/nlopes/slack/block_unknown.go
deleted file mode 100644
index b5ce1e47..00000000
--- a/vendor/github.com/nlopes/slack/block_unknown.go
+++ /dev/null
@@ -1,14 +0,0 @@
-package slack
-
-// UnknownBlock represents a block type that is not yet known. This block type exists to prevent Slack from introducing
-// new and unknown block types that break this library.
-type UnknownBlock struct {
-	Type     MessageBlockType `json:"type"`
-	BlockID  string           `json:"block_id,omitempty"`
-	Elements BlockElements    `json:"elements"`
-}
-
-// BlockType returns the type of the block
-func (b UnknownBlock) BlockType() MessageBlockType {
-	return b.Type
-}
diff --git a/vendor/github.com/nlopes/slack/go.sum b/vendor/github.com/nlopes/slack/go.sum
deleted file mode 100644
index 3bb45c1f..00000000
--- a/vendor/github.com/nlopes/slack/go.sum
+++ /dev/null
@@ -1,22 +0,0 @@
-github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/gorilla/websocket v1.2.0 h1:VJtLvh6VQym50czpZzx07z/kw9EgAxI3x1ZB8taTMQQ=
-github.com/gorilla/websocket v1.2.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
-github.com/nlopes/slack v0.1.0/go.mod h1:jVI4BBK3lSktibKahxBF74txcK2vyvkza1z/+rRnVAM=
-github.com/nlopes/slack v0.5.0 h1:NbIae8Kd0NpqaEI3iUrsuS0KbcEDhzhc939jLW5fNm0=
-github.com/nlopes/slack v0.5.0/go.mod h1:jVI4BBK3lSktibKahxBF74txcK2vyvkza1z/+rRnVAM=
-github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
-github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
-github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
-github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/stretchr/testify v1.2.0/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
-github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
-github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
-github.com/victorcoder/slack-test v0.0.0-20190131110821-6f9a569c10af h1:JFxr+No3ZWgCtxnnTWCybnB/z0Iy3qLmdj3u2NV5o48=
-github.com/victorcoder/slack-test v0.0.0-20190131110821-6f9a569c10af/go.mod h1:dStM4ShMus8J3hiq66ExbbzGLkwyZ+RQJePwFhWCCvQ=
-github.com/victorcoder/slack-test v0.0.0-20190131113129-a43b3bb77f43 h1:wtFekkaAAQibpy3iE4Hhx2Gi9pZAbITOSfVP7GXk5eM=
-github.com/victorcoder/slack-test v0.0.0-20190131113129-a43b3bb77f43/go.mod h1:dStM4ShMus8J3hiq66ExbbzGLkwyZ+RQJePwFhWCCvQ=
-golang.org/x/net v0.0.0-20180108090419-434ec0c7fe37 h1:BkNcmLtAVeWe9h5k0jt24CQgaG5vb4x/doFbAiEC/Ho=
-golang.org/x/net v0.0.0-20180108090419-434ec0c7fe37/go.mod h1:mL1N/T3taQHkDXs73rZJwtUhF3w3ftmwwsq0BUmARs4=
diff --git a/vendor/github.com/nlopes/slack/.gitignore b/vendor/github.com/slack-go/slack/.gitignore
index ac6f3eeb..ac6f3eeb 100644
--- a/vendor/github.com/nlopes/slack/.gitignore
+++ b/vendor/github.com/slack-go/slack/.gitignore
diff --git a/vendor/github.com/nlopes/slack/.gometalinter.json b/vendor/github.com/slack-go/slack/.gometalinter.json
index 5fa629d4..5fa629d4 100644
--- a/vendor/github.com/nlopes/slack/.gometalinter.json
+++ b/vendor/github.com/slack-go/slack/.gometalinter.json
diff --git a/vendor/github.com/nlopes/slack/.travis.yml b/vendor/github.com/slack-go/slack/.travis.yml
index 6a968232..6a968232 100644
--- a/vendor/github.com/nlopes/slack/.travis.yml
+++ b/vendor/github.com/slack-go/slack/.travis.yml
diff --git a/vendor/github.com/nlopes/slack/CHANGELOG.md b/vendor/github.com/slack-go/slack/CHANGELOG.md
index 48bcce55..48bcce55 100644
--- a/vendor/github.com/nlopes/slack/CHANGELOG.md
+++ b/vendor/github.com/slack-go/slack/CHANGELOG.md
diff --git a/vendor/github.com/nlopes/slack/LICENSE b/vendor/github.com/slack-go/slack/LICENSE
index 5145171f..5145171f 100644
--- a/vendor/github.com/nlopes/slack/LICENSE
+++ b/vendor/github.com/slack-go/slack/LICENSE
diff --git a/vendor/github.com/slack-go/slack/Makefile b/vendor/github.com/slack-go/slack/Makefile
new file mode 100644
index 00000000..1c64747d
--- /dev/null
+++ b/vendor/github.com/slack-go/slack/Makefile
@@ -0,0 +1,36 @@
+.PHONY: help deps fmt lint test test-race test-integration
+
+help:
+	@echo ""
+	@echo "Welcome to slack-go/slack make."
+	@echo "The following commands are available:"
+	@echo ""
+	@echo "    make deps              : Fetch all dependencies"
+	@echo "    make fmt               : Run go fmt to fix any formatting issues"
+	@echo "    make lint              : Use go vet to check for linting issues"
+	@echo "    make test              : Run all short tests"
+	@echo "    make test-race         : Run all tests with race condition checking"
+	@echo "    make test-integration  : Run all tests without limiting to short"
+	@echo ""
+	@echo "    make pr-prep           : Run this before making a PR to run fmt, lint and tests"
+	@echo ""
+
+deps:
+	@go mod tidy
+
+fmt:
+	@go fmt .
+
+lint:
+	@go vet .
+
+test:
+	@go test -count=1 -timeout 300s -short .
+
+test-race:
+	@go test -count=1 -timeout 300s -short -race .
+
+test-integration:
+	@go test -count=1 -timeout 600s .
+
+pr-prep: fmt lint test-race test-integration
diff --git a/vendor/github.com/nlopes/slack/README.md b/vendor/github.com/slack-go/slack/README.md
index a5e8e5ef..eaf07782 100644
--- a/vendor/github.com/nlopes/slack/README.md
+++ b/vendor/github.com/slack-go/slack/README.md
@@ -1,5 +1,6 @@
-Slack API in Go [![GoDoc](https://godoc.org/github.com/nlopes/slack?status.svg)](https://godoc.org/github.com/nlopes/slack) [![Build Status](https://travis-ci.org/nlopes/slack.svg)](https://travis-ci.org/nlopes/slack)
+Slack API in Go [![GoDoc](https://godoc.org/github.com/slack-go/slack?status.svg)](https://godoc.org/github.com/slack-go/slack) [![Build Status](https://travis-ci.org/slack-go/slack.svg)](https://travis-ci.org/slack-go/slack)
 ===============
+This is the original Slack library for Go created by Norberto Lopez, transferred to a Github organization.
 
 [![Join the chat at https://gitter.im/go-slack/Lobby](https://badges.gitter.im/go-slack/Lobby.svg)](https://gitter.im/go-slack/Lobby?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
 
@@ -12,13 +13,13 @@ a fully managed way.
 
 ## Changelog
 
-[CHANGELOG.md](https://github.com/nlopes/slack/blob/master/CHANGELOG.md) is available. Please visit it for updates.
+[CHANGELOG.md](https://github.com/slack-go/slack/blob/master/CHANGELOG.md) is available. Please visit it for updates.
 
 ## Installing
 
 ### *go get*
 
-    $ go get -u github.com/nlopes/slack
+    $ go get -u github.com/slack-go/slack
 
 ## Example
 
@@ -28,7 +29,7 @@ a fully managed way.
 import (
 	"fmt"
 
-	"github.com/nlopes/slack"
+	"github.com/slack-go/slack"
 )
 
 func main() {
@@ -53,7 +54,7 @@ func main() {
 import (
     "fmt"
 
-    "github.com/nlopes/slack"
+    "github.com/slack-go/slack"
 )
 
 func main() {
@@ -69,12 +70,12 @@ func main() {
 
 ## Minimal RTM usage:
 
-See https://github.com/nlopes/slack/blob/master/examples/websocket/websocket.go
+See https://github.com/slack-go/slack/blob/master/examples/websocket/websocket.go
 
 
 ## Minimal EventsAPI usage:
 
-See https://github.com/nlopes/slack/blob/master/examples/eventsapi/events.go
+See https://github.com/slack-go/slack/blob/master/examples/eventsapi/events.go
 
 
 ## Contributing
@@ -82,6 +83,14 @@ See https://github.com/nlopes/slack/blob/master/examples/eventsapi/events.go
 You are more than welcome to contribute to this project.  Fork and
 make a Pull Request, or create an Issue if you see any problem.
 
+Before making any Pull Request please run the following:
+
+```
+make pr-prep
+```
+
+This will check/update code formatting, linting and then run all tests
+
 ## License
 
 BSD 2 Clause license
diff --git a/vendor/github.com/nlopes/slack/TODO.txt b/vendor/github.com/slack-go/slack/TODO.txt
index 8607960b..8607960b 100644
--- a/vendor/github.com/nlopes/slack/TODO.txt
+++ b/vendor/github.com/slack-go/slack/TODO.txt
diff --git a/vendor/github.com/nlopes/slack/admin.go b/vendor/github.com/slack-go/slack/admin.go
index d51426b5..d51426b5 100644
--- a/vendor/github.com/nlopes/slack/admin.go
+++ b/vendor/github.com/slack-go/slack/admin.go
diff --git a/vendor/github.com/nlopes/slack/attachments.go b/vendor/github.com/slack-go/slack/attachments.go
index af62fb67..b5b79f9f 100644
--- a/vendor/github.com/nlopes/slack/attachments.go
+++ b/vendor/github.com/slack-go/slack/attachments.go
@@ -61,7 +61,7 @@ type ConfirmationField struct {
 // Attachment contains all the information for an attachment
 type Attachment struct {
 	Color    string `json:"color,omitempty"`
-	Fallback string `json:"fallback"`
+	Fallback string `json:"fallback,omitempty"`
 
 	CallbackID string `json:"callback_id,omitempty"`
 	ID         int    `json:"id,omitempty"`
@@ -84,7 +84,7 @@ type Attachment struct {
 	Actions    []AttachmentAction `json:"actions,omitempty"`
 	MarkdownIn []string           `json:"mrkdwn_in,omitempty"`
 
-	Blocks []Block `json:"blocks,omitempty"`
+	Blocks Blocks `json:"blocks,omitempty"`
 
 	Footer     string `json:"footer,omitempty"`
 	FooterIcon string `json:"footer_icon,omitempty"`
diff --git a/vendor/github.com/nlopes/slack/auth.go b/vendor/github.com/slack-go/slack/auth.go
index dc1dbcdf..dc1dbcdf 100644
--- a/vendor/github.com/nlopes/slack/auth.go
+++ b/vendor/github.com/slack-go/slack/auth.go
diff --git a/vendor/github.com/nlopes/slack/backoff.go b/vendor/github.com/slack-go/slack/backoff.go
index 2ba697e7..2ba697e7 100644
--- a/vendor/github.com/nlopes/slack/backoff.go
+++ b/vendor/github.com/slack-go/slack/backoff.go
diff --git a/vendor/github.com/nlopes/slack/block.go b/vendor/github.com/slack-go/slack/block.go
index 502b1135..32ff260c 100644
--- a/vendor/github.com/nlopes/slack/block.go
+++ b/vendor/github.com/slack-go/slack/block.go
@@ -14,6 +14,7 @@ const (
 	MBTImage   MessageBlockType = "image"
 	MBTAction  MessageBlockType = "actions"
 	MBTContext MessageBlockType = "context"
+	MBTInput   MessageBlockType = "input"
 )
 
 // Block defines an interface all block types should implement
diff --git a/vendor/github.com/nlopes/slack/block_action.go b/vendor/github.com/slack-go/slack/block_action.go
index fe46a95c..fe46a95c 100644
--- a/vendor/github.com/nlopes/slack/block_action.go
+++ b/vendor/github.com/slack-go/slack/block_action.go
diff --git a/vendor/github.com/nlopes/slack/block_context.go b/vendor/github.com/slack-go/slack/block_context.go
index c37bf27e..c37bf27e 100644
--- a/vendor/github.com/nlopes/slack/block_context.go
+++ b/vendor/github.com/slack-go/slack/block_context.go
diff --git a/vendor/github.com/nlopes/slack/block_conv.go b/vendor/github.com/slack-go/slack/block_conv.go
index 9f5d52c7..ce48ce19 100644
--- a/vendor/github.com/nlopes/slack/block_conv.go
+++ b/vendor/github.com/slack-go/slack/block_conv.go
@@ -58,13 +58,18 @@ func (b *Blocks) UnmarshalJSON(data []byte) error {
 			block = &DividerBlock{}
 		case "image":
 			block = &ImageBlock{}
+		case "input":
+			block = &InputBlock{}
 		case "section":
 			block = &SectionBlock{}
 		case "rich_text":
 			// for now ignore the (complex) content of rich_text blocks until we can fully support it
 			continue
+		case "file":
+			// for now ignore the file blocks until we can fully support it
+			continue
 		default:
-			block = &UnknownBlock{}
+			return errors.New("unsupported block type")
 		}
 
 		err = json.Unmarshal(r, block)
@@ -79,6 +84,46 @@ func (b *Blocks) UnmarshalJSON(data []byte) error {
 	return nil
 }
 
+// UnmarshalJSON implements the Unmarshaller interface for InputBlock, so that any JSON
+// unmarshalling is delegated and proper type determination can be made before unmarshal
+func (b *InputBlock) UnmarshalJSON(data []byte) error {
+	type alias InputBlock
+	a := struct {
+		Element json.RawMessage `json:"element"`
+		*alias
+	}{
+		alias: (*alias)(b),
+	}
+
+	if err := json.Unmarshal(data, &a); err != nil {
+		return err
+	}
+
+	s := sumtype{}
+	if err := json.Unmarshal(a.Element, &s); err != nil {
+		return nil
+	}
+
+	var e BlockElement
+	switch s.TypeVal {
+	case "datepicker":
+		e = &DatePickerBlockElement{}
+	case "plain_text_input":
+		e = &PlainTextInputBlockElement{}
+	case "static_select", "external_select", "users_select", "conversations_select", "channels_select":
+		e = &SelectBlockElement{}
+	default:
+		return errors.New("unsupported block element type")
+	}
+
+	if err := json.Unmarshal(a.Element, e); err != nil {
+		return err
+	}
+	b.Element = e
+
+	return nil
+}
+
 // MarshalJSON implements the Marshaller interface for BlockElements so that any JSON
 // marshalling is delegated and proper type determination can be made before marshal
 func (b *BlockElements) MarshalJSON() ([]byte, error) {
@@ -127,10 +172,12 @@ func (b *BlockElements) UnmarshalJSON(data []byte) error {
 			blockElement = &OverflowBlockElement{}
 		case "datepicker":
 			blockElement = &DatePickerBlockElement{}
+		case "plain_text_input":
+			blockElement = &PlainTextInputBlockElement{}
 		case "static_select", "external_select", "users_select", "conversations_select", "channels_select":
 			blockElement = &SelectBlockElement{}
 		default:
-			blockElement = &UnknownBlockElement{}
+			return errors.New("unsupported block element type")
 		}
 
 		err = json.Unmarshal(r, blockElement)
diff --git a/vendor/github.com/nlopes/slack/block_divider.go b/vendor/github.com/slack-go/slack/block_divider.go
index 2d442ba1..2d442ba1 100644
--- a/vendor/github.com/nlopes/slack/block_divider.go
+++ b/vendor/github.com/slack-go/slack/block_divider.go
diff --git a/vendor/github.com/nlopes/slack/block_element.go b/vendor/github.com/slack-go/slack/block_element.go
index 5b1b4b01..e0a7bf96 100644
--- a/vendor/github.com/nlopes/slack/block_element.go
+++ b/vendor/github.com/slack-go/slack/block_element.go
@@ -3,10 +3,11 @@ package slack
 // https://api.slack.com/reference/messaging/block-elements
 
 const (
-	METImage      MessageElementType = "image"
-	METButton     MessageElementType = "button"
-	METOverflow   MessageElementType = "overflow"
-	METDatepicker MessageElementType = "datepicker"
+	METImage          MessageElementType = "image"
+	METButton         MessageElementType = "button"
+	METOverflow       MessageElementType = "overflow"
+	METDatepicker     MessageElementType = "datepicker"
+	METPlainTextInput MessageElementType = "plain_text_input"
 
 	MixedElementImage MixedElementType = "mixed_image"
 	MixedElementText  MixedElementType = "mixed_text"
@@ -62,20 +63,6 @@ type BlockElements struct {
 	ElementSet []BlockElement `json:"elements,omitempty"`
 }
 
-// UnknownBlockElement any block element that this library does not directly support.
-// See the "Rich Elements" section at the following URL:
-// https://api.slack.com/changelog/2019-09-what-they-see-is-what-you-get-and-more-and-less
-// New block element types may be introduced by Slack at any time; this is a catch-all for any such block elements.
-type UnknownBlockElement struct {
-	Type     MessageElementType `json:"type"`
-	Elements BlockElements
-}
-
-// ElementType returns the type of the Element
-func (s UnknownBlockElement) ElementType() MessageElementType {
-	return s.Type
-}
-
 // ImageBlockElement An element to insert an image - this element can be used
 // in section and context blocks only. If you want a block with only an image
 // in it, you're looking for the image block.
@@ -250,3 +237,31 @@ func NewDatePickerBlockElement(actionID string) *DatePickerBlockElement {
 		ActionID: actionID,
 	}
 }
+
+// PlainTextInputBlockElement creates a field where a user can enter freeform data.
+// Plain-text input elements are currently only available in modals.
+//
+// More Information: https://api.slack.com/reference/messaging/block-elements#input
+type PlainTextInputBlockElement struct {
+	Type         MessageElementType `json:"type"`
+	ActionID     string             `json:"action_id"`
+	Placeholder  *TextBlockObject   `json:"placeholder,omitempty"`
+	InitialValue string             `json:"initial_value,omitempty"`
+	Multiline    bool               `json:"multiline,omitempty"`
+	MinLength    int                `json:"min_length,omitempty"`
+	MaxLength    int                `json:"max_length,omitempty"`
+}
+
+// ElementType returns the type of the Element
+func (s PlainTextInputBlockElement) ElementType() MessageElementType {
+	return s.Type
+}
+
+// NewPlainTextInputBlockElement returns an instance of a plain-text input element
+func NewPlainTextInputBlockElement(placeholder *TextBlockObject, actionID string) *PlainTextInputBlockElement {
+	return &PlainTextInputBlockElement{
+		Type:        METPlainTextInput,
+		ActionID:    actionID,
+		Placeholder: placeholder,
+	}
+}
diff --git a/vendor/github.com/nlopes/slack/block_image.go b/vendor/github.com/slack-go/slack/block_image.go
index 6de3f63a..6de3f63a 100644
--- a/vendor/github.com/nlopes/slack/block_image.go
+++ b/vendor/github.com/slack-go/slack/block_image.go
diff --git a/vendor/github.com/slack-go/slack/block_input.go b/vendor/github.com/slack-go/slack/block_input.go
new file mode 100644
index 00000000..9d082038
--- /dev/null
+++ b/vendor/github.com/slack-go/slack/block_input.go
@@ -0,0 +1,30 @@
+package slack
+
+// InputBlock defines data that is used to collect information from users -
+// it can hold a plain-text input element, a select menu element,
+// a multi-select menu element, or a datepicker.
+//
+// More Information: https://api.slack.com/reference/messaging/blocks#input
+type InputBlock struct {
+	Type     MessageBlockType `json:"type"`
+	BlockID  string           `json:"block_id,omitempty"`
+	Label    *TextBlockObject `json:"label"`
+	Element  BlockElement     `json:"element"`
+	Hint     *TextBlockObject `json:"hint,omitempty"`
+	Optional bool             `json:"optional,omitempty"`
+}
+
+// BlockType returns the type of the block
+func (s InputBlock) BlockType() MessageBlockType {
+	return s.Type
+}
+
+// NewInputBlock returns a new instance of an Input Block
+func NewInputBlock(blockID string, label *TextBlockObject, element BlockElement) *InputBlock {
+	return &InputBlock{
+		Type:    MBTInput,
+		BlockID: blockID,
+		Label:   label,
+		Element: element,
+	}
+}
diff --git a/vendor/github.com/nlopes/slack/block_object.go b/vendor/github.com/slack-go/slack/block_object.go
index 824ec93c..824ec93c 100644
--- a/vendor/github.com/nlopes/slack/block_object.go
+++ b/vendor/github.com/slack-go/slack/block_object.go
diff --git a/vendor/github.com/nlopes/slack/block_section.go b/vendor/github.com/slack-go/slack/block_section.go
index 01ffd5a1..01ffd5a1 100644
--- a/vendor/github.com/nlopes/slack/block_section.go
+++ b/vendor/github.com/slack-go/slack/block_section.go
diff --git a/vendor/github.com/nlopes/slack/bots.go b/vendor/github.com/slack-go/slack/bots.go
index da21ba0c..da21ba0c 100644
--- a/vendor/github.com/nlopes/slack/bots.go
+++ b/vendor/github.com/slack-go/slack/bots.go
diff --git a/vendor/github.com/nlopes/slack/channels.go b/vendor/github.com/slack-go/slack/channels.go
index c99e6655..c99e6655 100644
--- a/vendor/github.com/nlopes/slack/channels.go
+++ b/vendor/github.com/slack-go/slack/channels.go
diff --git a/vendor/github.com/nlopes/slack/chat.go b/vendor/github.com/slack-go/slack/chat.go
index c0744842..b54f8d6d 100644
--- a/vendor/github.com/nlopes/slack/chat.go
+++ b/vendor/github.com/slack-go/slack/chat.go
@@ -6,7 +6,7 @@ import (
 	"net/http"
 	"net/url"
 
-	"github.com/nlopes/slack/slackutilsx"
+	"github.com/slack-go/slack/slackutilsx"
 )
 
 const (
@@ -347,11 +347,11 @@ func MsgOptionUnfurl(timestamp string, unfurls map[string]Attachment) MsgOption
 }
 
 // MsgOptionResponseURL supplies a url to use as the endpoint.
-func MsgOptionResponseURL(url string, rt string) MsgOption {
+func MsgOptionResponseURL(url string, responseType string) MsgOption {
 	return func(config *sendConfig) error {
 		config.mode = chatResponse
 		config.endpoint = url
-		config.responseType = rt
+		config.responseType = responseType
 		config.values.Del("ts")
 		return nil
 	}
diff --git a/vendor/github.com/nlopes/slack/comment.go b/vendor/github.com/slack-go/slack/comment.go
index 7d1c0d4e..7d1c0d4e 100644
--- a/vendor/github.com/nlopes/slack/comment.go
+++ b/vendor/github.com/slack-go/slack/comment.go
diff --git a/vendor/github.com/nlopes/slack/conversation.go b/vendor/github.com/slack-go/slack/conversation.go
index 1e4a61f1..1e4a61f1 100644
--- a/vendor/github.com/nlopes/slack/conversation.go
+++ b/vendor/github.com/slack-go/slack/conversation.go
diff --git a/vendor/github.com/nlopes/slack/dialog.go b/vendor/github.com/slack-go/slack/dialog.go
index 376cd9e6..376cd9e6 100644
--- a/vendor/github.com/nlopes/slack/dialog.go
+++ b/vendor/github.com/slack-go/slack/dialog.go
diff --git a/vendor/github.com/nlopes/slack/dialog_select.go b/vendor/github.com/slack-go/slack/dialog_select.go
index 385cef68..385cef68 100644
--- a/vendor/github.com/nlopes/slack/dialog_select.go
+++ b/vendor/github.com/slack-go/slack/dialog_select.go
diff --git a/vendor/github.com/nlopes/slack/dialog_text.go b/vendor/github.com/slack-go/slack/dialog_text.go
index da06bd6d..da06bd6d 100644
--- a/vendor/github.com/nlopes/slack/dialog_text.go
+++ b/vendor/github.com/slack-go/slack/dialog_text.go
diff --git a/vendor/github.com/nlopes/slack/dnd.go b/vendor/github.com/slack-go/slack/dnd.go
index a3aa680c..a3aa680c 100644
--- a/vendor/github.com/nlopes/slack/dnd.go
+++ b/vendor/github.com/slack-go/slack/dnd.go
diff --git a/vendor/github.com/nlopes/slack/emoji.go b/vendor/github.com/slack-go/slack/emoji.go
index b2b0c6c9..b2b0c6c9 100644
--- a/vendor/github.com/nlopes/slack/emoji.go
+++ b/vendor/github.com/slack-go/slack/emoji.go
diff --git a/vendor/github.com/nlopes/slack/errors.go b/vendor/github.com/slack-go/slack/errors.go
index b31e2caf..a1dfec25 100644
--- a/vendor/github.com/nlopes/slack/errors.go
+++ b/vendor/github.com/slack-go/slack/errors.go
@@ -1,6 +1,6 @@
 package slack
 
-import "github.com/nlopes/slack/internal/errorsx"
+import "github.com/slack-go/slack/internal/errorsx"
 
 // Errors returned by various methods.
 const (
diff --git a/vendor/github.com/nlopes/slack/files.go b/vendor/github.com/slack-go/slack/files.go
index 3a7363de..3a7363de 100644
--- a/vendor/github.com/nlopes/slack/files.go
+++ b/vendor/github.com/slack-go/slack/files.go
diff --git a/vendor/github.com/nlopes/slack/go.mod b/vendor/github.com/slack-go/slack/go.mod
index a97bf381..cbe11808 100644
--- a/vendor/github.com/nlopes/slack/go.mod
+++ b/vendor/github.com/slack-go/slack/go.mod
@@ -1,7 +1,10 @@
-module github.com/matterbridge/slack
+module github.com/slack-go/slack
+
+go 1.13
 
 require (
 	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/go-test/deep v1.0.4
 	github.com/gorilla/websocket v1.2.0
 	github.com/pkg/errors v0.8.0
 	github.com/pmezard/go-difflib v1.0.0 // indirect
diff --git a/vendor/github.com/slack-go/slack/go.sum b/vendor/github.com/slack-go/slack/go.sum
new file mode 100644
index 00000000..7a0ae46e
--- /dev/null
+++ b/vendor/github.com/slack-go/slack/go.sum
@@ -0,0 +1,12 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/go-test/deep v1.0.4 h1:u2CU3YKy9I2pmu9pX0eq50wCgjfGIt539SqR7FbHiho=
+github.com/go-test/deep v1.0.4/go.mod h1:wGDj63lr65AM2AQyKZd/NYHGb0R+1RLqB8NKt3aSFNA=
+github.com/gorilla/websocket v1.2.0 h1:VJtLvh6VQym50czpZzx07z/kw9EgAxI3x1ZB8taTMQQ=
+github.com/gorilla/websocket v1.2.0/go.mod h1:E7qHFY5m1UJ88s3WnNqhKjPHQ0heANvMoAMk2YaljkQ=
+github.com/pkg/errors v0.8.0 h1:WdK/asTD0HN+q6hsWO3/vpuAkAr+tw6aNJNDFFf0+qw=
+github.com/pkg/errors v0.8.0/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.2.2 h1:bSDNvY7ZPG5RlJ8otE/7V6gMiyenm9RtJ7IUVIAoJ1w=
+github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
diff --git a/vendor/github.com/nlopes/slack/groups.go b/vendor/github.com/slack-go/slack/groups.go
index 23374869..23374869 100644
--- a/vendor/github.com/nlopes/slack/groups.go
+++ b/vendor/github.com/slack-go/slack/groups.go
diff --git a/vendor/github.com/nlopes/slack/history.go b/vendor/github.com/slack-go/slack/history.go
index 87b2e1ed..87b2e1ed 100644
--- a/vendor/github.com/nlopes/slack/history.go
+++ b/vendor/github.com/slack-go/slack/history.go
diff --git a/vendor/github.com/nlopes/slack/im.go b/vendor/github.com/slack-go/slack/im.go
index ee784fef..ee784fef 100644
--- a/vendor/github.com/nlopes/slack/im.go
+++ b/vendor/github.com/slack-go/slack/im.go
diff --git a/vendor/github.com/nlopes/slack/info.go b/vendor/github.com/slack-go/slack/info.go
index 31f459f1..31f459f1 100644
--- a/vendor/github.com/nlopes/slack/info.go
+++ b/vendor/github.com/slack-go/slack/info.go
diff --git a/vendor/github.com/nlopes/slack/interactions.go b/vendor/github.com/slack-go/slack/interactions.go
index de1ed370..26a8b6db 100644
--- a/vendor/github.com/nlopes/slack/interactions.go
+++ b/vendor/github.com/slack-go/slack/interactions.go
@@ -44,6 +44,7 @@ type InteractionCallback struct {
 	MessageTs       string          `json:"message_ts"`
 	AttachmentID    string          `json:"attachment_id"`
 	ActionCallback  ActionCallbacks `json:"actions"`
+	APIAppID        string          `json:"api_app_id"`
 	DialogSubmissionCallback
 }
 
diff --git a/vendor/github.com/nlopes/slack/internal/errorsx/errorsx.go b/vendor/github.com/slack-go/slack/internal/errorsx/errorsx.go
index cb850577..cb850577 100644
--- a/vendor/github.com/nlopes/slack/internal/errorsx/errorsx.go
+++ b/vendor/github.com/slack-go/slack/internal/errorsx/errorsx.go
diff --git a/vendor/github.com/nlopes/slack/internal/timex/timex.go b/vendor/github.com/slack-go/slack/internal/timex/timex.go
index 40063f73..40063f73 100644
--- a/vendor/github.com/nlopes/slack/internal/timex/timex.go
+++ b/vendor/github.com/slack-go/slack/internal/timex/timex.go
diff --git a/vendor/github.com/nlopes/slack/item.go b/vendor/github.com/slack-go/slack/item.go
index 89af4eb1..89af4eb1 100644
--- a/vendor/github.com/nlopes/slack/item.go
+++ b/vendor/github.com/slack-go/slack/item.go
diff --git a/vendor/github.com/nlopes/slack/logger.go b/vendor/github.com/slack-go/slack/logger.go
index 6a3533a9..6a3533a9 100644
--- a/vendor/github.com/nlopes/slack/logger.go
+++ b/vendor/github.com/slack-go/slack/logger.go
diff --git a/vendor/github.com/nlopes/slack/messageID.go b/vendor/github.com/slack-go/slack/messageID.go
index a17472b4..a17472b4 100644
--- a/vendor/github.com/nlopes/slack/messageID.go
+++ b/vendor/github.com/slack-go/slack/messageID.go
diff --git a/vendor/github.com/nlopes/slack/messages.go b/vendor/github.com/slack-go/slack/messages.go
index f67d99a7..f2f5b145 100644
--- a/vendor/github.com/nlopes/slack/messages.go
+++ b/vendor/github.com/slack-go/slack/messages.go
@@ -15,13 +15,14 @@ type OutgoingMessage struct {
 // Message is an auxiliary type to allow us to have a message containing sub messages
 type Message struct {
 	Msg
-	SubMessage *Msg `json:"message,omitempty"`
+	SubMessage      *Msg `json:"message,omitempty"`
 	PreviousMessage *Msg `json:"previous_message,omitempty"`
 }
 
 // Msg contains information about a slack message
 type Msg struct {
 	// Basic Message
+	ClientMsgID     string       `json:"client_msg_id"`
 	Type            string       `json:"type,omitempty"`
 	Channel         string       `json:"channel,omitempty"`
 	User            string       `json:"user,omitempty"`
diff --git a/vendor/github.com/nlopes/slack/misc.go b/vendor/github.com/slack-go/slack/misc.go
index 0dcee950..0dcee950 100644
--- a/vendor/github.com/nlopes/slack/misc.go
+++ b/vendor/github.com/slack-go/slack/misc.go
diff --git a/vendor/github.com/nlopes/slack/oauth.go b/vendor/github.com/slack-go/slack/oauth.go
index 29d6dce9..29d6dce9 100644
--- a/vendor/github.com/nlopes/slack/oauth.go
+++ b/vendor/github.com/slack-go/slack/oauth.go
diff --git a/vendor/github.com/nlopes/slack/pagination.go b/vendor/github.com/slack-go/slack/pagination.go
index 87dd136a..87dd136a 100644
--- a/vendor/github.com/nlopes/slack/pagination.go
+++ b/vendor/github.com/slack-go/slack/pagination.go
diff --git a/vendor/github.com/nlopes/slack/pins.go b/vendor/github.com/slack-go/slack/pins.go
index ef97c8df..ef97c8df 100644
--- a/vendor/github.com/nlopes/slack/pins.go
+++ b/vendor/github.com/slack-go/slack/pins.go
diff --git a/vendor/github.com/nlopes/slack/reactions.go b/vendor/github.com/slack-go/slack/reactions.go
index 2a9bd42e..2a9bd42e 100644
--- a/vendor/github.com/nlopes/slack/reactions.go
+++ b/vendor/github.com/slack-go/slack/reactions.go
diff --git a/vendor/github.com/nlopes/slack/reminders.go b/vendor/github.com/slack-go/slack/reminders.go
index 9b905387..9b905387 100644
--- a/vendor/github.com/nlopes/slack/reminders.go
+++ b/vendor/github.com/slack-go/slack/reminders.go
diff --git a/vendor/github.com/nlopes/slack/rtm.go b/vendor/github.com/slack-go/slack/rtm.go
index ef6ba343..ef6ba343 100644
--- a/vendor/github.com/nlopes/slack/rtm.go
+++ b/vendor/github.com/slack-go/slack/rtm.go
diff --git a/vendor/github.com/nlopes/slack/search.go b/vendor/github.com/slack-go/slack/search.go
index de6b40ac..de6b40ac 100644
--- a/vendor/github.com/nlopes/slack/search.go
+++ b/vendor/github.com/slack-go/slack/search.go
diff --git a/vendor/github.com/nlopes/slack/security.go b/vendor/github.com/slack-go/slack/security.go
index dbe8fb2d..dbe8fb2d 100644
--- a/vendor/github.com/nlopes/slack/security.go
+++ b/vendor/github.com/slack-go/slack/security.go
diff --git a/vendor/github.com/nlopes/slack/slack.go b/vendor/github.com/slack-go/slack/slack.go
index 94230526..d342a3e8 100644
--- a/vendor/github.com/nlopes/slack/slack.go
+++ b/vendor/github.com/slack-go/slack/slack.go
@@ -96,7 +96,7 @@ func New(token string, options ...Option) *Client {
 		token:      token,
 		endpoint:   APIURL,
 		httpclient: &http.Client{},
-		log:        log.New(os.Stderr, "nlopes/slack", log.LstdFlags|log.Lshortfile),
+		log:        log.New(os.Stderr, "slack-go/slack", log.LstdFlags|log.Lshortfile),
 	}
 
 	for _, opt := range options {
diff --git a/vendor/github.com/nlopes/slack/slackutilsx/slackutilsx.go b/vendor/github.com/slack-go/slack/slackutilsx/slackutilsx.go
index 1f7b2b8c..1f7b2b8c 100644
--- a/vendor/github.com/nlopes/slack/slackutilsx/slackutilsx.go
+++ b/vendor/github.com/slack-go/slack/slackutilsx/slackutilsx.go
diff --git a/vendor/github.com/nlopes/slack/slash.go b/vendor/github.com/slack-go/slack/slash.go
index f62065a2..f62065a2 100644
--- a/vendor/github.com/nlopes/slack/slash.go
+++ b/vendor/github.com/slack-go/slack/slash.go
diff --git a/vendor/github.com/nlopes/slack/stars.go b/vendor/github.com/slack-go/slack/stars.go
index 52967604..52967604 100644
--- a/vendor/github.com/nlopes/slack/stars.go
+++ b/vendor/github.com/slack-go/slack/stars.go
diff --git a/vendor/github.com/nlopes/slack/team.go b/vendor/github.com/slack-go/slack/team.go
index 029e2b5b..029e2b5b 100644
--- a/vendor/github.com/nlopes/slack/team.go
+++ b/vendor/github.com/slack-go/slack/team.go
diff --git a/vendor/github.com/nlopes/slack/usergroups.go b/vendor/github.com/slack-go/slack/usergroups.go
index f3206591..9417f817 100644
--- a/vendor/github.com/nlopes/slack/usergroups.go
+++ b/vendor/github.com/slack-go/slack/usergroups.go
@@ -206,7 +206,7 @@ func (api *Client) UpdateUserGroupContext(ctx context.Context, userGroup UserGro
 	if userGroup.Description != "" {
 		values["description"] = []string{userGroup.Description}
 	}
-	
+
 	if len(userGroup.Prefs.Channels) > 0 {
 		values["channels"] = []string{strings.Join(userGroup.Prefs.Channels, ",")}
 	}
diff --git a/vendor/github.com/nlopes/slack/users.go b/vendor/github.com/slack-go/slack/users.go
index 4da8e4ce..6001e0fa 100644
--- a/vendor/github.com/nlopes/slack/users.go
+++ b/vendor/github.com/slack-go/slack/users.go
@@ -44,14 +44,14 @@ type UserProfile struct {
 // UserProfileCustomFields represents user profile's custom fields.
 // Slack API's response data type is inconsistent so we use the struct.
 // For detail, please see below.
-// https://github.com/nlopes/slack/pull/298#discussion_r185159233
+// https://github.com/slack-go/slack/pull/298#discussion_r185159233
 type UserProfileCustomFields struct {
 	fields map[string]UserProfileCustomField
 }
 
 // UnmarshalJSON is the implementation of the json.Unmarshaler interface.
 func (fields *UserProfileCustomFields) UnmarshalJSON(b []byte) error {
-	// https://github.com/nlopes/slack/pull/298#discussion_r185159233
+	// https://github.com/slack-go/slack/pull/298#discussion_r185159233
 	if string(b) == "[]" {
 		return nil
 	}
diff --git a/vendor/github.com/slack-go/slack/views.go b/vendor/github.com/slack-go/slack/views.go
new file mode 100644
index 00000000..afe391bf
--- /dev/null
+++ b/vendor/github.com/slack-go/slack/views.go
@@ -0,0 +1,221 @@
+package slack
+
+import (
+	"context"
+	"encoding/json"
+)
+
+const (
+	VTModal   ViewType = "modal"
+	VTHomeTab ViewType = "home"
+)
+
+type ViewType string
+
+type View struct {
+	SlackResponse
+	ID              string           `json:"id"`
+	TeamID          string           `json:"team_id"`
+	Type            ViewType         `json:"type"`
+	Title           *TextBlockObject `json:"title"`
+	Close           *TextBlockObject `json:"close"`
+	Submit          *TextBlockObject `json:"submit"`
+	Blocks          Blocks           `json:"blocks"`
+	PrivateMetadata string           `json:"private_metadata"`
+	CallbackID      string           `json:"callback_id"`
+	State           interface{}      `json:"state"`
+	Hash            string           `json:"hash"`
+	ClearOnClose    bool             `json:"clear_on_close"`
+	NotifyOnClose   bool             `json:"notify_on_close"`
+	RootViewID      string           `json:"root_view_id"`
+	PreviousViewID  string           `json:"previous_view_id"`
+	AppID           string           `json:"app_id"`
+	ExternalID      string           `json:"external_id"`
+	BotID           string           `json:"bot_id"`
+}
+
+type ModalViewRequest struct {
+	Type            ViewType         `json:"type"`
+	Title           *TextBlockObject `json:"title"`
+	Blocks          Blocks           `json:"blocks"`
+	Close           *TextBlockObject `json:"close"`
+	Submit          *TextBlockObject `json:"submit"`
+	PrivateMetadata string           `json:"private_metadata"`
+	CallbackID      string           `json:"callback_id"`
+	ClearOnClose    bool             `json:"clear_on_close"`
+	NotifyOnClose   bool             `json:"notify_on_close"`
+	ExternalID      string           `json:"external_id"`
+}
+
+func (v *ModalViewRequest) ViewType() ViewType {
+	return v.Type
+}
+
+type HomeTabViewRequest struct {
+	Type            ViewType `json:"type"`
+	Blocks          Blocks   `json:"blocks"`
+	PrivateMetadata string   `json:"private_metadata"`
+	CallbackID      string   `json:"callback_id"`
+	ExternalID      string   `json:"external_id"`
+}
+
+func (v *HomeTabViewRequest) ViewType() ViewType {
+	return v.Type
+}
+
+type openViewRequest struct {
+	TriggerID string           `json:"trigger_id"`
+	View      ModalViewRequest `json:"view"`
+}
+
+type publishViewRequest struct {
+	UserID string             `json:"user_id"`
+	View   HomeTabViewRequest `json:"view"`
+	Hash   string             `json:"hash"`
+}
+
+type pushViewRequest struct {
+	TriggerID string           `json:"trigger_id"`
+	View      ModalViewRequest `json:"view"`
+}
+
+type updateViewRequest struct {
+	View       ModalViewRequest `json:"view"`
+	ExternalID string           `json:"external_id"`
+	Hash       string           `json:"hash"`
+	ViewID     string           `json:"view_id"`
+}
+
+type ViewResponse struct {
+	SlackResponse
+	View `json:"view"`
+}
+
+// OpenView opens a view for a user.
+func (api *Client) OpenView(triggerID string, view ModalViewRequest) (*ViewResponse, error) {
+	return api.OpenViewContext(context.Background(), triggerID, view)
+}
+
+// OpenViewContext opens a view for a user with a custom context.
+func (api *Client) OpenViewContext(
+	ctx context.Context,
+	triggerID string,
+	view ModalViewRequest,
+) (*ViewResponse, error) {
+	if triggerID == "" {
+		return nil, ErrParametersMissing
+	}
+	req := openViewRequest{
+		TriggerID: triggerID,
+		View:      view,
+	}
+	encoded, err := json.Marshal(req)
+	if err != nil {
+		return nil, err
+	}
+	endpoint := api.endpoint + "views.open"
+	resp := &ViewResponse{}
+	err = postJSON(ctx, api.httpclient, endpoint, api.token, encoded, resp, api)
+	if err != nil {
+		return nil, err
+	}
+	return resp, resp.Err()
+}
+
+// PublishView publishes a static view for a user.
+func (api *Client) PublishView(userID string, view HomeTabViewRequest, hash string) (*ViewResponse, error) {
+	return api.PublishViewContext(context.Background(), userID, view, hash)
+}
+
+// PublishViewContext publishes a static view for a user with a custom context.
+func (api *Client) PublishViewContext(
+	ctx context.Context,
+	userID string,
+	view HomeTabViewRequest,
+	hash string,
+) (*ViewResponse, error) {
+	if userID == "" {
+		return nil, ErrParametersMissing
+	}
+	req := publishViewRequest{
+		UserID: userID,
+		View:   view,
+		Hash:   hash,
+	}
+	encoded, err := json.Marshal(req)
+	if err != nil {
+		return nil, err
+	}
+	endpoint := api.endpoint + "views.publish"
+	resp := &ViewResponse{}
+	err = postJSON(ctx, api.httpclient, endpoint, api.token, encoded, resp, api)
+	if err != nil {
+		return nil, err
+	}
+	return resp, resp.Err()
+}
+
+// PushView pushes a view onto the stack of a root view.
+func (api *Client) PushView(triggerID string, view ModalViewRequest) (*ViewResponse, error) {
+	return api.PushViewContext(context.Background(), triggerID, view)
+}
+
+// PublishViewContext pushes a view onto the stack of a root view with a custom context.
+func (api *Client) PushViewContext(
+	ctx context.Context,
+	triggerID string,
+	view ModalViewRequest,
+) (*ViewResponse, error) {
+	if triggerID == "" {
+		return nil, ErrParametersMissing
+	}
+	req := pushViewRequest{
+		TriggerID: triggerID,
+		View:      view,
+	}
+	encoded, err := json.Marshal(req)
+	if err != nil {
+		return nil, err
+	}
+	endpoint := api.endpoint + "views.push"
+	resp := &ViewResponse{}
+	err = postJSON(ctx, api.httpclient, endpoint, api.token, encoded, resp, api)
+	if err != nil {
+		return nil, err
+	}
+	return resp, resp.Err()
+}
+
+// UpdateView updates an existing view.
+func (api *Client) UpdateView(view ModalViewRequest, externalID, hash, viewID string) (*ViewResponse, error) {
+	return api.UpdateViewContext(context.Background(), view, externalID, hash, viewID)
+}
+
+// UpdateViewContext updates an existing view with a custom context.
+func (api *Client) UpdateViewContext(
+	ctx context.Context,
+	view ModalViewRequest,
+	externalID, hash,
+	viewID string,
+) (*ViewResponse, error) {
+	if externalID == "" && viewID == "" {
+		return nil, ErrParametersMissing
+	}
+	req := updateViewRequest{
+		View:       view,
+		ExternalID: externalID,
+		Hash:       hash,
+		ViewID:     viewID,
+	}
+	encoded, err := json.Marshal(req)
+	if err != nil {
+		return nil, err
+	}
+	endpoint := api.endpoint + "views.update"
+	resp := &ViewResponse{}
+	err = postJSON(ctx, api.httpclient, endpoint, api.token, encoded, resp, api)
+	if err != nil {
+		return nil, err
+	}
+	return resp, resp.Err()
+}
diff --git a/vendor/github.com/nlopes/slack/webhooks.go b/vendor/github.com/slack-go/slack/webhooks.go
index 14e1b8dd..1016cb4f 100644
--- a/vendor/github.com/nlopes/slack/webhooks.go
+++ b/vendor/github.com/slack-go/slack/webhooks.go
@@ -1,11 +1,8 @@
 package slack
 
 import (
-	"bytes"
-	"encoding/json"
+	"context"
 	"net/http"
-
-	"github.com/pkg/errors"
 )
 
 type WebhookMessage struct {
@@ -20,21 +17,13 @@ type WebhookMessage struct {
 }
 
 func PostWebhook(url string, msg *WebhookMessage) error {
-	return PostWebhookCustomHTTP(url, http.DefaultClient, msg)
+	return PostWebhookCustomHTTPContext(context.Background(), url, http.DefaultClient, msg)
 }
 
-func PostWebhookCustomHTTP(url string, httpClient *http.Client, msg *WebhookMessage) error {
-	raw, err := json.Marshal(msg)
-
-	if err != nil {
-		return errors.Wrap(err, "marshal failed")
-	}
-
-	response, err := httpClient.Post(url, "application/json", bytes.NewReader(raw))
-
-	if err != nil {
-		return errors.Wrap(err, "failed to post webhook")
-	}
+func PostWebhookContext(ctx context.Context, url string, msg *WebhookMessage) error {
+	return PostWebhookCustomHTTPContext(ctx, url, http.DefaultClient, msg)
+}
 
-	return checkStatusCode(response, discard{})
+func PostWebhookCustomHTTP(url string, httpClient *http.Client, msg *WebhookMessage) error {
+	return PostWebhookCustomHTTPContext(context.Background(), url, httpClient, msg)
 }
diff --git a/vendor/github.com/slack-go/slack/webhooks_go112.go b/vendor/github.com/slack-go/slack/webhooks_go112.go
new file mode 100644
index 00000000..4e0db0e4
--- /dev/null
+++ b/vendor/github.com/slack-go/slack/webhooks_go112.go
@@ -0,0 +1,34 @@
+// +build !go1.13
+
+package slack
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"net/http"
+
+	"github.com/pkg/errors"
+)
+
+func PostWebhookCustomHTTPContext(ctx context.Context, url string, httpClient *http.Client, msg *WebhookMessage) error {
+	raw, err := json.Marshal(msg)
+	if err != nil {
+		return errors.Wrap(err, "marshal failed")
+	}
+
+	req, err := http.NewRequest(http.MethodPost, url, bytes.NewReader(raw))
+	if err != nil {
+		return errors.Wrap(err, "failed new request")
+	}
+	req = req.WithContext(ctx)
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := httpClient.Do(req)
+	if err != nil {
+		return errors.Wrap(err, "failed to post webhook")
+	}
+	defer resp.Body.Close()
+
+	return checkStatusCode(resp, discard{})
+}
diff --git a/vendor/github.com/slack-go/slack/webhooks_go113.go b/vendor/github.com/slack-go/slack/webhooks_go113.go
new file mode 100644
index 00000000..99c243f5
--- /dev/null
+++ b/vendor/github.com/slack-go/slack/webhooks_go113.go
@@ -0,0 +1,33 @@
+// +build go1.13
+
+package slack
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"net/http"
+
+	"github.com/pkg/errors"
+)
+
+func PostWebhookCustomHTTPContext(ctx context.Context, url string, httpClient *http.Client, msg *WebhookMessage) error {
+	raw, err := json.Marshal(msg)
+	if err != nil {
+		return errors.Wrap(err, "marshal failed")
+	}
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, url, bytes.NewReader(raw))
+	if err != nil {
+		return errors.Wrap(err, "failed new request")
+	}
+	req.Header.Set("Content-Type", "application/json")
+
+	resp, err := httpClient.Do(req)
+	if err != nil {
+		return errors.Wrap(err, "failed to post webhook")
+	}
+	defer resp.Body.Close()
+
+	return checkStatusCode(resp, discard{})
+}
diff --git a/vendor/github.com/nlopes/slack/websocket.go b/vendor/github.com/slack-go/slack/websocket.go
index d6895f2a..d6895f2a 100644
--- a/vendor/github.com/nlopes/slack/websocket.go
+++ b/vendor/github.com/slack-go/slack/websocket.go
diff --git a/vendor/github.com/nlopes/slack/websocket_channels.go b/vendor/github.com/slack-go/slack/websocket_channels.go
index 7dd3319b..7dd3319b 100644
--- a/vendor/github.com/nlopes/slack/websocket_channels.go
+++ b/vendor/github.com/slack-go/slack/websocket_channels.go
diff --git a/vendor/github.com/nlopes/slack/websocket_desktop_notification.go b/vendor/github.com/slack-go/slack/websocket_desktop_notification.go
index 7c61abf7..7c61abf7 100644
--- a/vendor/github.com/nlopes/slack/websocket_desktop_notification.go
+++ b/vendor/github.com/slack-go/slack/websocket_desktop_notification.go
diff --git a/vendor/github.com/nlopes/slack/websocket_dm.go b/vendor/github.com/slack-go/slack/websocket_dm.go
index 98bf6f88..98bf6f88 100644
--- a/vendor/github.com/nlopes/slack/websocket_dm.go
+++ b/vendor/github.com/slack-go/slack/websocket_dm.go
diff --git a/vendor/github.com/nlopes/slack/websocket_dnd.go b/vendor/github.com/slack-go/slack/websocket_dnd.go
index 62ddea3a..62ddea3a 100644
--- a/vendor/github.com/nlopes/slack/websocket_dnd.go
+++ b/vendor/github.com/slack-go/slack/websocket_dnd.go
diff --git a/vendor/github.com/nlopes/slack/websocket_files.go b/vendor/github.com/slack-go/slack/websocket_files.go
index 8c5bd4f8..8c5bd4f8 100644
--- a/vendor/github.com/nlopes/slack/websocket_files.go
+++ b/vendor/github.com/slack-go/slack/websocket_files.go
diff --git a/vendor/github.com/nlopes/slack/websocket_groups.go b/vendor/github.com/slack-go/slack/websocket_groups.go
index eb88985c..eb88985c 100644
--- a/vendor/github.com/nlopes/slack/websocket_groups.go
+++ b/vendor/github.com/slack-go/slack/websocket_groups.go
diff --git a/vendor/github.com/nlopes/slack/websocket_internals.go b/vendor/github.com/slack-go/slack/websocket_internals.go
index 3e1906ee..3e1906ee 100644
--- a/vendor/github.com/nlopes/slack/websocket_internals.go
+++ b/vendor/github.com/slack-go/slack/websocket_internals.go
diff --git a/vendor/github.com/nlopes/slack/websocket_managed_conn.go b/vendor/github.com/slack-go/slack/websocket_managed_conn.go
index dbbf682d..6395938c 100644
--- a/vendor/github.com/nlopes/slack/websocket_managed_conn.go
+++ b/vendor/github.com/slack-go/slack/websocket_managed_conn.go
@@ -10,8 +10,8 @@ import (
 	"time"
 
 	"github.com/gorilla/websocket"
-	"github.com/nlopes/slack/internal/errorsx"
-	"github.com/nlopes/slack/internal/timex"
+	"github.com/slack-go/slack/internal/errorsx"
+	"github.com/slack-go/slack/internal/timex"
 )
 
 // ManageConnection can be called on a Slack RTM instance returned by the
diff --git a/vendor/github.com/nlopes/slack/websocket_misc.go b/vendor/github.com/slack-go/slack/websocket_misc.go
index 65a8bb65..65a8bb65 100644
--- a/vendor/github.com/nlopes/slack/websocket_misc.go
+++ b/vendor/github.com/slack-go/slack/websocket_misc.go
diff --git a/vendor/github.com/nlopes/slack/websocket_pins.go b/vendor/github.com/slack-go/slack/websocket_pins.go
index 95445e28..95445e28 100644
--- a/vendor/github.com/nlopes/slack/websocket_pins.go
+++ b/vendor/github.com/slack-go/slack/websocket_pins.go
diff --git a/vendor/github.com/nlopes/slack/websocket_reactions.go b/vendor/github.com/slack-go/slack/websocket_reactions.go
index e4973878..e4973878 100644
--- a/vendor/github.com/nlopes/slack/websocket_reactions.go
+++ b/vendor/github.com/slack-go/slack/websocket_reactions.go
diff --git a/vendor/github.com/nlopes/slack/websocket_stars.go b/vendor/github.com/slack-go/slack/websocket_stars.go
index e0f2dda3..e0f2dda3 100644
--- a/vendor/github.com/nlopes/slack/websocket_stars.go
+++ b/vendor/github.com/slack-go/slack/websocket_stars.go
diff --git a/vendor/github.com/nlopes/slack/websocket_subteam.go b/vendor/github.com/slack-go/slack/websocket_subteam.go
index a23b274c..a23b274c 100644
--- a/vendor/github.com/nlopes/slack/websocket_subteam.go
+++ b/vendor/github.com/slack-go/slack/websocket_subteam.go
diff --git a/vendor/github.com/nlopes/slack/websocket_teams.go b/vendor/github.com/slack-go/slack/websocket_teams.go
index 3898c833..3898c833 100644
--- a/vendor/github.com/nlopes/slack/websocket_teams.go
+++ b/vendor/github.com/slack-go/slack/websocket_teams.go
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 1d3a2f21..ad37c05c 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -135,11 +135,6 @@ 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 v0.6.0 => github.com/matterbridge/slack v0.1.1-0.20191208194820-95190f11bfb6
-github.com/nlopes/slack
-github.com/nlopes/slack/internal/errorsx
-github.com/nlopes/slack/internal/timex
-github.com/nlopes/slack/slackutilsx
 # github.com/paulrosania/go-charset v0.0.0-20190326053356-55c9d7a5834c
 github.com/paulrosania/go-charset/charset
 github.com/paulrosania/go-charset/data
@@ -169,6 +164,11 @@ github.com/sirupsen/logrus
 github.com/skip2/go-qrcode
 github.com/skip2/go-qrcode/bitset
 github.com/skip2/go-qrcode/reedsolomon
+# github.com/slack-go/slack v0.6.3-0.20200228121756-f56d616d5901
+github.com/slack-go/slack
+github.com/slack-go/slack/internal/errorsx
+github.com/slack-go/slack/internal/timex
+github.com/slack-go/slack/slackutilsx
 # github.com/spf13/afero v1.1.2
 github.com/spf13/afero
 github.com/spf13/afero/mem