* Release checklist

- Version number in __init__.py
- Classifiers in pyproject.toml
    https://pypi.python.org/pypi?%3Aaction=list_classifiers
- Copyright date in NOTICE.txt
- Update README.rst with latest changes
- Kits:
    $ make tag
    # .github/workflows/publish.yml publishes with trusted publishing
    $ make ghrelease
