Update aiohttp to 3.6.3

[pyup-bot]

This PR updates aiohttp from 3.6.1 to 3.6.3.

Changelog

3.6.2

==================

Features
--------

- Made exceptions pickleable. Also changed the repr of some exceptions.
`4077 <https://github.com/aio-libs/aiohttp/issues/4077>`_
- Use ``Iterable`` type hint instead of ``Sequence`` for ``Application`` *middleware*
parameter.  `4125 <https://github.com/aio-libs/aiohttp/issues/4125>`_


Bugfixes
--------

- Reset the ``sock_read`` timeout each time data is received for a
``aiohttp.ClientResponse``.  `3808
<https://github.com/aio-libs/aiohttp/issues/3808>`_
- Fix handling of expired cookies so they are not stored in CookieJar.
`4063 <https://github.com/aio-libs/aiohttp/issues/4063>`_
- Fix misleading message in the string representation of ``ClientConnectorError``;
``self.ssl == None`` means default SSL context, not SSL disabled `4097
<https://github.com/aio-libs/aiohttp/issues/4097>`_
- Don't clobber HTTP status when using FileResponse.
`4106 <https://github.com/aio-libs/aiohttp/issues/4106>`_


Improved Documentation
----------------------

- Added minimal required logging configuration to logging documentation.
`2469 <https://github.com/aio-libs/aiohttp/issues/2469>`_
- Update docs to reflect proxy support.
`4100 <https://github.com/aio-libs/aiohttp/issues/4100>`_
- Fix typo in code example in testing docs.
`4108 <https://github.com/aio-libs/aiohttp/issues/4108>`_


Misc
----

- `4102 <https://github.com/aio-libs/aiohttp/issues/4102>`_


----

Links

• PyPI: https://pypi.org/project/aiohttp
• Changelog: https://pyup.io/changelogs/aiohttp/
• Repo: https://github.com/aio-libs/aiohttp

[pyup-bot]

Closing this in favor of #50