1. Bump _VERSION_ in ddgr
2. Update date and version in ddgr.1
3. Update packagecore.yaml, if necessary
4. Update CHANGELOG with the new changes
5. Make sure help text in README.md is up-to-date
6. Create signed tag and push to GitHub
7. Create a GitHub release and populate the release notes section with what went into CHANGELOG earlier
8. Notify downstream package maintainers

PyPI update procedure:

sudo pip3 install -U wheel twine
python3 setup.py sdist
python3 setup.py bdist_wheel
twine upload dist/ddgr-$version{.tar.gz,-py3-none-any.whl}