!fix(application_commands): Fixed SubCommand autocomplete handling

Author: mccoderpy

discord/application_commands.py

@@ -840,6 +840,7 @@ def __init__(self,
         self.cog = kwargs.get('cog', None)
         self.connector = kwargs.get('connector', {})
         self.guild_id = kwargs.get('guild_id', parent.guild_id)
+        self.autocomplete_func = None
         super().__init__(OptionType.sub_command, name=name, description=description,
                          name_localizations=name_localizations, description_localizations=description_localizations,
                          __options=options)

discord/channel.py

@@ -1922,6 +1922,9 @@ def _add_thread(self, thread: ThreadChannel) -> None:
     def _remove_thread(self, thread: ThreadChannel) -> None:
         self._posts.pop(thread.id, None)
 
+    def _update(self, guild, data) -> None:
+        pass
+
 
 class PartialMessageable(abc.Messageable, Hashable):
     """Represents a partial messageable to aid with working messageable channels when