Python-engineio-v3

- Apply timeouts to all HTTP requests sent from the client [127](https://github.com/miguelgrinberg/python-engineio/issues/127) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/6666d6a092333aa60f48ccdc42b250be60e9f33c))
- Shutdown non responding websocket connections in the client [326](https://github.com/miguelgrinberg/python-socketio/issues/326) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/95731e9e2d66e8ee91faeb5538dcde84b88466bd))
- Catch OSError exceptions from websockets package [328](https://github.com/miguelgrinberg/python-socketio/issues/328) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/0adc074e58dac1d81f769ed1a2edfcab5e0644d1))

- Skip CORS headers when origin is not given by client [131](https://github.com/miguelgrinberg/python-engineio/issues/131) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/a349d4e3ce25ff771027f986c7594d840cc9e941))
- Add `async_handler`s sub-package to setup.py ([commit](https://github.com/miguelgrinberg/python-engineio/commit/e4163b64f3482d2d97dccf813a880cb6ad088533))

- Restore CORS disable option [329](https://github.com/miguelgrinberg/python-socketio/issues/329) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/9f4cd8cf9e7be6baf4bc8c485e7ad204dd87be75))

- Address potential websocket cross-origin attacks [128](https://github.com/miguelgrinberg/python-engineio/issues/128) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/7548f704a0a3000b7ac8a6c88796c4ae58aa9c37))
- Documentation for the Same Origin security policy ([commit](https://github.com/miguelgrinberg/python-engineio/commit/5b5879469348c529c283e1d81032a603c5e69b31))
- Remove tests from built package [124](https://github.com/miguelgrinberg/python-engineio/issues/124) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/399dc8acf2077856c4bd8edb22d0f254b47f0ca2)) (thanks **Pablo Escodebar**!)

- Correctly autodetect asgi async mode [122](https://github.com/miguelgrinberg/python-engineio/issues/122) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/2690ea08b3d3beeaf34b5b4871ac1b567e048a9f))
- Omit response when asyncio websocket ends [120](https://github.com/miguelgrinberg/python-engineio/issues/120) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/f13074670dcd95e578d17f00b91845139e4f25eb))
- Improved ocumentation on user session behavior on disconnections ([commit](https://github.com/miguelgrinberg/python-engineio/commit/6b8e667ad26c4e654f84b7f12b851c07d801211d))
- Correct spelling mistakes in documentation [119](https://github.com/miguelgrinberg/python-engineio/issues/119) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/a4404989a1c48b3522c09a7f6335f2ad401805a2)) (thanks **Edward Betts**!)

- Optimization to static file serving ([commit](https://github.com/miguelgrinberg/python-engineio/commit/5b8701042678b3e092e2be365bdd31b425b714f6))
- Do not reset connection when packet queue timeouts [110](https://github.com/miguelgrinberg/python-engineio/issues/110) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/e64e5a67b723400e20cb7c5a014413a4445d9184)) (thanks **Victor Moyano**!)