1.2.1    19.04.2021
           - add MANIFEST.SKIP
1.2.0    08.04.2021
           - revert "can't start message: previous message wasn't finished"
           - move C++ codes to its own library with cmake
           - improve API
           - add C tests
1.1.4    25.11.2020
           - improve makefile
           - bugfix: avoid error "can't start message: previous message wasn't finished" after empty control frame
           - log levels related changes
           - constant related changes
1.1.3    30.10.2020
           - libcatch related bump
1.1.2    19.06.2020
           - improve logging
1.1.1    15.04.2020
           - using Error with backtrace for all thrown exceptions
1.1.0    10.04.2020
           - improve frame/message parsing
           - add Error::unexpected_rsv if a frame received with rsvX set without associated extension
           - refactor tests
           - add suggested_close_code()
           - raise parsing errors for invalid close codes
           - support for utf8 validation for TEXT frames (disabled by default)
           - pass all autobahn tests
1.0.3    03.04.2020
           - renamed from Protocol::WebSocket::XS to Protocol::WebSocket::Fast
1.0.2    03.04.2020
           - remove usage of private Panda::Lib module
1.0.1    02.04.2020
           - fix synopsis
1.0.0    02.04.2020
           - first release
