Release steps

• intltool-update --maintain to see what is missing in POTFILES.in
• xgettext ... to generate hamster.pot
• make a tarball and send to the translation team
• Check for pending PRs
• Check issues, update milestones if needed
• update NEWS
• update version number manually (bumpversion is a time drain) https://semver.org/
• git commit -m "update version to "
• git push upstream HEAD:master
• Prepare a draft release.
• Update the contributors link
• Update NEWS link
• Update diff links
• publish release (that creates the tag)
• update diff link with new tag

(copied from https://github.com/projecthamster/hamster/projects/1#card-33057749 by ederag)