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/MessageDelete.js

@@ -11,6 +11,7 @@ class MessageDeleteAction extends Action {
       message = channel.messages.get(data.id);
       if (message) {
         channel.messages.delete(message.id);
+        message.deleted = true;
         client.emit(Events.MESSAGE_DELETE, message);
       }
     }