Run towncrier and bump version to 0.4.1 for release

Bump version to 0.4.0 for release and update changelog

Bump version to 0.3.0 and run towncrier for release

Bump version to 0.2.2 for release, run towncrier, update CI matrix

Update release notes and bump version to 0.2.1 for release

Bump version to 0.2.0 for release

Bump version to 0.1.0 for release