lastMessage in chat (#1606)

* lastMessage in chat

* lastMessage info

* Update src/util/Injected.js

Co-authored-by: Rajeh Taher <rajeh@reforward.dev>

* fix  serialize msg

* markup

---------

Co-authored-by: tofers <tofers90>
Co-authored-by: Rajeh Taher <rajeh@reforward.dev>

src/structures/Chat.js

@@ -75,6 +75,12 @@ class Chat extends Base {
          */
         this.muteExpiration = data.muteExpiration;
 
+        /**
+         * Last message fo chat
+         * @type {Message}
+         */
+        this.lastMessage = data.lastMessage ? new Message(super.client, data.lastMessage) : undefined;
+        
         return super._patch(data);
     }