feat: Add "deleted" property to multiple structures. (#2556)

* Add "deleted" property to "Message" structure

* Add "deleted" property to Multiple structures

Structures edited:
- Channel
- Emoji
- Guild
- Guild Member
- Role

* Update "deletable" getter

* Fix ESLint "no-trailing-spaces" errors

* Requested Change: Mark w/ bulkDelete

src/client/actions/ChannelDelete.js

@@ -13,6 +13,7 @@ class ChannelDeleteAction extends Action {
 
     if (channel) {
       client.channels.remove(channel.id);
+      channel.deleted = true;
       client.emit(Events.CHANNEL_DELETE, channel);
     }