20.1
Relicense under both Apache License, v2.0 and a 2 clause BSD license
Update manylinux detection to be robust to incompatible ABIs (#221)
Add tests for new python_version logic
Fix testsuite for pytest 5.x
Autoformat with black
Don't have packaging.tags.compatible_tags() reuse an iterable (#258)
Introduce major, minor and micro aliases to Version