fix cmd.name to name

when add_command function has name and alias like _cmd.add_command(_other_cmd, "command", aliases=["cmd"]), aliases does not work.

Author: hyunho1027

click_aliases/__init__.py

@@ -26,7 +26,7 @@ def add_command(self, *args, **kwargs):
 
  self._commands[name] = aliases
  for alias in aliases:
- self._aliases[alias] = cmd.name
+ self._aliases[alias] = name
 
  def command(self, *args, **kwargs):
  aliases = kwargs.pop("aliases", [])