The setup and teardown functions in extensions must now be coroutines.
ext.commands.Bot.load_extension()
must now be awaited.ext.commands.Bot.unload_extension()
must now be awaited.ext.commands.Bot.reload_extension()
must now be awaited.ext.commands.Bot.add_cog()
must now be awaited.ext.commands.Bot.remove_cog()
must now be awaited.
bot.load_extension(name)
→ await bot.load_extension(name)