Python-engineio

- More robust handling of polling disconnects [254](https://github.com/miguelgrinberg/python-engineio/issues/254) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/e0bb263499525f5bd7eeb5195eea2dbf049d92b2))
- Clearer client logs after disconnect [342](https://github.com/miguelgrinberg/python-engineio/issues/342) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/5b538a74061d893f255ac3544ffe1402ae97b58e))

- Combine ssl_verify with other SSL options ([commit](https://github.com/miguelgrinberg/python-engineio/commit/cea2f92b7094dba8b1b0943bab9e833a5362affe)) (thanks **Simon Fonteneau**!)
- Hold references to background tasks to avoid garbage collection ([commit](https://github.com/miguelgrinberg/python-engineio/commit/0729554455d9ab1bdd36e6386272fb2d6b5607c6))
- Clearer documentation for the `max_http_buffer_size` argument ([commit](https://github.com/miguelgrinberg/python-engineio/commit/88b19f93ffea7bc1e9527889b9c2b830d082ce6b))

- Fix invalid WebSocket responses [331](https://github.com/miguelgrinberg/python-engineio/issues/331) [#332](https://github.com/miguelgrinberg/python-engineio/issues/332) [#338](https://github.com/miguelgrinberg/python-engineio/issues/338) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/ccc7a86886f507bd7aa6985e5d1b070f9505ac46))

- Return consistent responses after Websocket connection ends ([commit](https://github.com/miguelgrinberg/python-engineio/commit/785c77c39d8c8fee37f969981f5a28ed2cc1b769))
- Migrate Python package metadata to pyproject.toml ([commit](https://github.com/miguelgrinberg/python-engineio/commit/f13b64d489ea99764f1a889987b1087f879967ea))
- Remove Python 3.7 from builds ([commit](https://github.com/miguelgrinberg/python-engineio/commit/f3717b244b6df09562760cc7e232d26a056bb1c2))
- Internal code restructure (no functional changes) ([commit 1](https://github.com/miguelgrinberg/python-engineio/commit/e26163c8bbc2341e30f91b6acba06b9157247562)) ([commit #2](https://github.com/miguelgrinberg/python-engineio/commit/f15527bc48e2d3da1668e09ab801e594f85b20d5)) ([commit #3](https://github.com/miguelgrinberg/python-engineio/commit/5c996bec85d864526fe41569438a6e15e4a53123)) ([commit #4](https://github.com/miguelgrinberg/python-engineio/commit/ca9ca5bdd1467929be311d5ddcbfd18b5f4231ae))

- Replace gevent-websocket with simple-websocket when using gevent ([commit](https://github.com/miguelgrinberg/python-engineio/commit/614f564275c635dc8b03d33dab44bf80d280cbcc))
- Catch and log all errors that occur in event handlers ([commit](https://github.com/miguelgrinberg/python-engineio/commit/2bef6d6fbbe684e5718f9202cd7af0ad19153495))
- Use daemon threads for background tasks also in the threaded client ([commit](https://github.com/miguelgrinberg/python-engineio/commit/53578088046ca9f29b6119c182c7bed67d7a4ffb))
- Silence exception on websocket exit when using uWSGI [330](https://github.com/miguelgrinberg/python-engineio/issues/330) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/9bc9e867e28e2495031bd1a552f4da0b1f0f575c))

- Added `send_packet()` method ([commit](https://github.com/miguelgrinberg/python-engineio/commit/48451a3a18c40c58cc5d4127250e4776e5b7f8db))
- Fixed race condition when lots of connections are ended at the same time [328](https://github.com/miguelgrinberg/python-engineio/issues/328) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/bb87ec652f55b41063400205971b0a667b78b162))
- Workaround for strange memory leak in Eventlet's `Thread` class [328](https://github.com/miguelgrinberg/python-engineio/issues/328) ([commit](https://github.com/miguelgrinberg/python-engineio/commit/d29aa9c44450c4ea729a0846091e3b105b8b7497))
- Use daemon threads for background tasks in threading mode ([commit](https://github.com/miguelgrinberg/python-engineio/commit/541f172a4a61ebc16ee32fa38b0f410c4c711fbf))
- Upgrade to pypy-3.9 in unit tests ([commit](https://github.com/miguelgrinberg/python-engineio/commit/4581e53ada773fef8976110cc6d4ae40783b38d8))