- version 6.0.0.post1
* Move from Travis CI to GitHub Actions for testing and publishing
Use PEP 517 builds
* Testing matrix and trove classifiers for Python 3.9
Type hints for all classes, methods, and functions
* Support for Python 3.6 has been removed due to its impending end of life and
the desire to leverage features from 3.7
* Remove Python 3.10 testing and support for now, as Travis CI only has
Python 3.10.0a5 which isn't compatible with recent pytest-randomly releases
* Indicate (by renaming) that all functions in the client module are private, except for call