I had to remove the comments because bumpversion will strip them out anyway upon re-writing the updated version string in setup.cfg file.
Similarly, I had to normalize the whitespace like bumpversion would do. :-/
`tag=True` option means a tag is automatically created when bumping the version with bumpversion script.
However, in order to get 'annotated' instead of 'lightweight' tags -- i.e. the tag also contains the tag author, date and message --, we need to (temporarily?) use a fork of bumpversion that includes an unmerged PR: https://github.com/peritus/bumpversion/pull/58
