[spike] investigate zest.releaser

[jpopelka]

• https://pypi.org/project/zest.releaser
• https://github.com/zestsoftware/zest.releaser
• https://zestreleaser.readthedocs.io
• https://opensourcehacker.com/2012/08/14/high-quality-automated-package-releases-for-python-with-zest-releaser
• https://techblog.socialwifi.com/how-to-painlessly-release-open-source-python-package

[TomasTomecek]

Interesting, but it doesn't seem to release to github; but we can definitely get inspired.

Edit: Also, the release process seems to be interactive.