v0.6.0: Release 0.6.0 (2021-05-27)

Bug fixes

* Various issues on Windows: testing, explicit utf-8 encoding
* Strings with unescaped \ declared r"aw"

Other changes:

* Removed support for Python 2.7, 3.5 and added for 3.9
* Travis CI is removed in favor of GitHub actions testing across
  all 3 major OSes (MacOS, Windows, GNU/Linux Ubuntu)
* CSL test-suite progressed from 5779a8c to c3db429

v0.5.1

Bugfix release 0.5.1 to mitigate failing installations of citeproc-py

v0.5.0

Release 0.5.0