20.4
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
Fix LEQ/GEQ for SpecifierSets when considering versions with a local version label (#304)
tags: Separate versions with multi-digit components with '_' (#240)
Autoformat with black
Introduce major, minor and micro aliases to Version