feat: boolean for indicating Status update messages (#396)

src/structures/Message.js

@@ -87,6 +87,12 @@ class Message extends Base {
          */
         this.isForwarded = data.isForwarded;
 
+        /**
+         * Indicates if the message is a status update
+         * @type {boolean}
+         */
+        this.isStatus = data.isStatusV3;
+
         /**
          * Indicates if the message was a broadcast
          * @type {boolean}