versioneer 0.23 on Python PyPI

What's Changed

MNT: Drop 3.6 support, remove old hacks by @effigies in #288
Clarify license as CC0-1.0 by @BastianZim in #292
MNT: Drop distutils by @effigies in #289
FIX: Restore py_modules field to setup.py by @effigies in #293
Update URL of tox by @DimitriPapadopoulos in #295
CI: Update Windows image to latest by @effigies in #290
FIX: skip version update on build_ext if .py does not exist by @mgorny in #297
FIX: old GIT (<1.7.2) does not know about --count flag by @foxtran in #306
FIX: Use only numeric versions in Git, ignore other tags with the same prefix by @effigies in #256
Undefined name: VersioneerBadRootError on line 51 by @cclauss in #305
MNT: Disable editable installs of versioneer (they will not work) by @effigies in #307
FIX: Handle missing tag_prefix gracefully by @effigies in #308
ENH: Patch versioneer files into manifest at runtime by @effigies in #309
CI: Update gh-actions PLATFORM variable to avoid double-testing by @effigies in #311
Adequate custom build_py command to changes in setuptools v64 by @abravalheri in #313
Appease flake8 by @simaoafonso-pwt in #312

Full Changelog: 0.22...0.23