Websocket-client

- Fix exception handling bug 694

- Removed Python 2 code, now only Python 3 compatible (d45343b, b7c5733, ff67af8)
- Use semver for release versions, unlike breaking release 0.58.0 (669)
- Enhance enableTrace output (13e83b4)
- Improve unit tests to over 80% code coverage (1679ab0, a00dd2d, etc.)
- Fix old _app.py close status code bug (resulted in on_close() requiring 3 args) (686)
- Replace select import with selectors (568)

- Last main release to support Python 2
- Fix Python 2 urlparse scheme (332)
- Add support for headers with multiple values (627)
- Add debug support for reserved custom status codes (639)
- Allow multiple Set-Cookie: headers (649)
- Simplified cookie sorting (662)
- Add no_proxy support (671)
- Add Host header to HTTP proxy request (677)
- Improve PEP8 style compliance (dc3f5c4)

- Fix README typos (659)
- Create README.md from README.rst (655)
- Capitalize 'Upgrade' in 'Connection: Upgrade' (605)
- Add Python 3.8 and 3.9 CI support (596)
- Replace deprecated `thread.isAlive` with `thread.is_alive` (594)
- Revert to LGPL v2.1 license (526)
- Add code coverage CI testing (663)
- Properly revert callback (442)
- Replace TravisCI with GitHub Actions (36e32c7)
- Create Sphinx readthedocs.io documentation (aace06b)

- wsdump: Fix --headers option (589)
- Fix getting 400 bad request with long proxy authorization string (587)
- Fix for errors that occur when closing websocket from another thread (586)
- avoid calling repr(data) if tracing is not enabled (584)
- Fixed typo (579)
- Create dummy `ssl` object (577)
- Show compressed text messages in wsdump.py (576)
- Resolve issue opening socket to intranet on Windows 10 with no proxy settings but behind proxy (573)
- Expose http connection header to user (566)
- Improve the readability of HTTP status codes. (553)
- fix the compatible issue with gevent+dnspython (547)
- v should be checked for empty string before splitting it (539)
- _handshake: hasattr checks on six before accessing the values (533)

- Don't retry sockets with timeout set to 0(536)