do better with loop cleanup (#3245)

* do better with loop cleanup

* changelog

* remove redundant line

* Do this a bit better than the initial pass

* Improve windows support

Make some other things coroutines to work with improved design

* Wish we'd have done this right from the start...

* Update deps surrounding this

 - see bpo-23057
 - neccessary for windows users
 - nice for consistent support channel info / feature availability

* dep issue

* Fix tests

* duplication plugin py version

* actually handle this

* Reconfigure some checks with codeclimate, disable pylint for now

* style

* Is my exasperation showing yet?

* handle some stupid stuff

* meh

* dep changelog

redbot/core/bank.py

@@ -1,6 +1,8 @@
+from __future__ import annotations
+
 import asyncio
 import datetime
-from typing import Union, List, Optional
+from typing import Union, List, Optional, TYPE_CHECKING
 from functools import wraps
 
 import discord
@@ -8,9 +10,12 @@ import discord
 from redbot.core.utils.chat_formatting import humanize_number
 from . import Config, errors, commands
 from .i18n import Translator
-from .bot import Red
+
 from .errors import BankPruneError
 
+if TYPE_CHECKING:
+    from .bot import Red
+
 _ = Translator("Bank API", __file__)
 
 __all__ = [