Merge pull request #1256 from IbirbyZh/add-edited-to-the-app-mention-…

…event

Edited field in the app mention event

slackevents/inner_events.go

@@ -28,6 +28,9 @@ type AppMentionEvent struct {
 
 	// BotID is filled out when a bot triggers the app_mention event
 	BotID string `json:"bot_id,omitempty"`
+
+	// When the app is mentioned in the edited message
+	Edited *Edited `json:"edited,omitempty"`
 }
 
 // AppHomeOpenedEvent Your Slack app home was opened.