Release 2.3.3 (#171)

* bump cibuildwheel

for building wheels for 3.14.0-rc2 instead of rc1

* release 2.3.3

Release v2.3.2

Bump version of vendored `cibuildwheel`

Release v2.3.0 (#134)

Release v2.2.0 (#106)

Update changelog and bump version number

Update CHANGELOG.md

Getting ready for a 2.1.1 release.

Using the release (non-beta) versions of Python 3.7