Python-socketio-v4

- assigning local ret variable to none if the asyncio task is canceled [164](https://github.com/miguelgrinberg/python-socketio/issues/164) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/598568c7152dc970dc740de040697e97cf374ec1)) (thanks **rettier**!)
- Recoonect to redis when connection is lost [143](https://github.com/miguelgrinberg/python-socketio/issues/143) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/af13ef067c0f5b357e80d0e7f718bb725ed55fd6))

- properly handle callbacks in multi-host configurations for asyncio ([commit](https://github.com/miguelgrinberg/python-socketio/commit/b3fc842c76d53c2632192c5fda3db42a0bb764cd))
- Properly handle callbacks in multi-host configurations [150](https://github.com/miguelgrinberg/python-socketio/issues/150) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/8d7059a1a22e2d5e3092623251ab357046595a33))
- aiohttp instead of flask in example HTML [91](https://github.com/miguelgrinberg/python-socketio/issues/91) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/06e7cece74b01707247d28537537eafd73d96f02)) (thanks **Jacopo Farina**!)
- Fix backquotes usage in docs. [146](https://github.com/miguelgrinberg/python-socketio/issues/146) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/ef7088d67a5b26fa57f921797057622f6525f768)) (thanks **Kane Blueriver**!)
- updated socketio js client to v2.0.4 in all examples ([commit](https://github.com/miguelgrinberg/python-socketio/commit/8415a7a33c324ee70002bf8893bb388768fd5cb1))

- fixed memory leak on rejected connections for asyncio ([commit](https://github.com/miguelgrinberg/python-socketio/commit/935077563490f890f1b1d596be9fc38c8d65588b))

- fixed memory leak on rejected connections [574](https://github.com/miguelgrinberg/Flask-SocketIO/issues/574) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/66e17fb387510522bc9a1718ae9da8b0f6ace005))

- JavaScript client sends query string attached to namespace [124](https://github.com/miguelgrinberg/python-socketio/issues/124) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/7f02f7aaa92c18c043466cb4721356221361f481))
- Update README.rst ([commit](https://github.com/miguelgrinberg/python-socketio/commit/8bba811408b2e3a570701b34113a53662915f97c))
- Documented protocol defaults ([commit](https://github.com/miguelgrinberg/python-socketio/commit/187c52582ba4a3c08a368e6b5f4033a417a432f1))

- Made queues non-durable. Always retry after disconnect. [120](https://github.com/miguelgrinberg/python-socketio/issues/120) ([commit](https://github.com/miguelgrinberg/python-socketio/commit/358a8e118fe73920fb7e0b72811f14c0daedeea2)) (thanks **Alex Plugaru**!)