[release] eventlet 0.36.0

[4383]

There is new debug features, lot of fixes, and no functional removals, so I propose a minor version (0.36.0).

List of commits:

3fcc9a5 Add asyncio API docs. (#939)
1612191 Make sure asyncio hub doesn't use greendns for asyncio DNS APIs (#938)
1c869fb add a python doc link about to_thread (#937)
520c6e2 Make asyncio.to_thread() work, with the same semantics as normal asyncio (#930)
48c259c Refactor congruence checks based on assert at runtime (#932)
a5539b5 [trivial] fix typos (#931)
88fd0e2 Run tests on macOS in CI, and some fixes to get it in reasonable state (#934)
1f3db00 Fix wsgi.server shutdown for in-flight requests (#912)
be36320 update sentence to refer to the migration guide (#928)
3e36f69 Add debug convenience helpers - asyncio, threads (#925)
0a130e2 Handle errors better. (#923)

Global diff between 0.35.2 and master (the coming release):

https://github.com/eventlet/eventlet/compare/v0.35.2..master

[4383]

Git tag: https://github.com/eventlet/eventlet/releases/tag/0.36.0
Pypi release: https://pypi.org/project/eventlet/0.36.0/

Thanks to all the persons who contributed to this new version.