Add support for cog aliases

discord/ext/commands/cog.py

@@ -86,6 +86,10 @@ class CogMeta(type):
         The cog description. By default, it is the cleaned docstring of the class.
 
         .. versionadded:: 1.6
+    aliases: Union[List[:class:`str`], Tuple[:class:`str`]]
+        A list of cog aliases. By default this is an empty list
+        
+        ..versionadded:: 2.0
 
     command_attrs: :class:`dict`
         A list of attributes to apply to every command inside this cog. The dictionary
@@ -113,6 +117,8 @@ class CogMeta(type):
         name, bases, attrs = args
         attrs['__cog_name__'] = kwargs.pop('name', name)
         attrs['__cog_settings__'] = kwargs.pop('command_attrs', {})
+        
+        attrs["__cog_aliases__"] = kwargs.pop("aliases", ())
 
         description = kwargs.pop('description', None)
         if description is None:
@@ -245,6 +251,15 @@ class Cog(metaclass=CogMeta):
     @description.setter
     def description(self, description: str) -> None:
         self.__cog_description__ = description
+        
+    @property
+    def aliases(self) -> List[str]:
+        """Union[List[:class:`str`], Tuple[:class:`str`]]: Returns the cog aliases."""
+        return self.__cog_aliases__
+    
+    @aliases.setter
+    def aliases(self, aliases: List[str]) -> None:
+        self.__cog_aliases__ = aliases
 
     def walk_commands(self) -> Generator[Command, None, None]:
         """An iterator that recursively walks through this cog's commands and subcommands.