[lint] Fix import order

Reorder imports to be consistenly grouped by standard library, third
party library, and local modules in that order thoughout the library.

discord/ext/commands/bot.py

@@ -26,13 +26,14 @@ DEALINGS IN THE SOFTWARE.
 
 import asyncio
 import collections
-import discord
 import inspect
 import importlib
 import sys
 import traceback
 import re
 
+import discord
+
 from .core import GroupMixin, Command
 from .view import StringView
 from .context import Context