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

tox.ini

@@ -5,7 +5,7 @@
 
 [tox]
 envlist =
-    py37
+    py38
     docs
     style
 skip_missing_interpreters = True
@@ -19,7 +19,7 @@ extras = voice, test
 commands =
     python -m compileall ./redbot/cogs
     pytest
-    pylint ./redbot
+#    pylint ./redbot
 
 [testenv:postgres]
 description = Run pytest with PostgreSQL backend
@@ -48,7 +48,7 @@ setenv =
     # This is just for Windows
     # Prioritise make.bat over any make.exe which might be on PATH
     PATHEXT=.BAT;.EXE
-basepython = python3.7
+basepython = python3.8
 extras = docs
 commands =
     sphinx-build -d "{toxworkdir}/docs_doctree" docs "{toxworkdir}/docs_out/html" -W -bhtml
@@ -64,7 +64,7 @@ setenv =
     # This is just for Windows
     # Prioritise make.bat over any make.exe which might be on PATH
     PATHEXT=.BAT;.EXE
-basepython = python3.7
+basepython = python3.8
 extras = style
 commands =
     make stylecheck