This ensures that any releases are fully tested before publication.
The workflow first builds the distribution files (sdist, wheel) before
using a deployment environment to publish these to PyPI, using the
GitHub actions OpenID support to authenticate with PyPI.
Tox manages test environments for all supported Python versions, as
well as linting and formatting tools. On GitHub, the test and lint
steps are kept as close as possible to the Makefile equivalents.
Martijn Pieters
long2ice