fix: Added jid of people who added to the group (#223)

Co-authored-by: DeveloperNewton <116108544+DeveloperNewton@users.noreply.github.com>
Co-authored-by: Edgard <edgardmessias@gmail.com>

src/Types/GroupMetadata.ts

@@ -26,6 +26,8 @@ export interface GroupMetadata {
     participants: GroupParticipant[]
     ephemeralDuration?: number
     inviteCode?: string
+    /** the person who added you */
+    author?: string
 }