[commads] Change cog/extension load/unload methods to be async

discord/__main__.py

@@ -66,9 +66,11 @@ import config
 class Bot(commands.{base}):
     def __init__(self, **kwargs):
         super().__init__(command_prefix=commands.when_mentioned_or('{prefix}'), **kwargs)
+
+    async def setup_hook(self):
         for cog in config.cogs:
             try:
-                self.load_extension(cog)
+                await self.load_extension(cog)
             except Exception as exc:
                 print(f'Could not load extension {{cog}} due to {{exc.__class__.__name__}}: {{exc}}')
 
@@ -122,12 +124,16 @@ class {name}(commands.Cog{attrs}):
     def __init__(self, bot):
         self.bot = bot
 {extra}
-def setup(bot):
-    bot.add_cog({name}(bot))
+async def setup(bot):
+    await bot.add_cog({name}(bot))
 '''
 
 _cog_extras = '''
-    def cog_unload(self):
+    async def cog_load(self):
+        # loading logic goes here
+        pass
+
+    async def cog_unload(self):
         # clean up logic goes here
         pass