add (better) typing back to actx.author that was removed in #848

Author: krittick

discord/commands/context.py

@@ -159,7 +159,7 @@ def message(self) -> Optional[Message]:
     def user(self) -> Optional[Union[Member, User]]:
         return self.interaction.user
 
-    author = user
+    author: Optional[Union[Member, User]] = user
 
     @property
     def voice_client(self) -> Optional[VoiceProtocol]: