Flask-socketio

- keep connected status in test client ([commit](https://github.com/miguelgrinberg/flask-socketio/commit/5e399d544317a741234d3260c04aca4ba2e18e5a))

- added flask_test_client option to Socket.IO test client ([commit](https://github.com/miguelgrinberg/flask-socketio/commit/074278808e9a732f5f9fcb9273a312fbb6e279bd))

- suppress web server warning when in write-only mode ([commit](https://github.com/miguelgrinberg/flask-socketio/commit/ca582618863070657f0565d614552a7f65c9fb6d))

- remove error about eventlet/gevent used with flask run ([commit](https://github.com/miguelgrinberg/flask-socketio/commit/9a717733a1a1a93c155d8b41402a5b5527b6eee1))

- discontinue the customized flask run command ([commit](https://github.com/miguelgrinberg/flask-socketio/commit/9bde4beda523d539e2113151e8c4d3f88765a5ea))
- spelling corrected [869](https://github.com/miguelgrinberg/flask-socketio/issues/869) ([commit](https://github.com/miguelgrinberg/flask-socketio/commit/afbd83ef75ed948bc5814c668b73f1be9573f0e4)) (thanks **Muhammad Hamza**!)

- make unit tests compatible with Python 3.7.1 ([commit](https://github.com/miguelgrinberg/flask-socketio/commit/f84a7dfbe34110dc604a7e2df9098e4348248d55))