Tracking version number with bumpversion

When making a new release you need to increase the version number. You will change the patch, minor or major version number, depending on how much you have changed in the package.

This time you have implemented a bug fix, changed the code style, changed the supported Python versions and written tests. If it weren't for the change to the supported Python version, this would probably only be a patch, as the only thing a user would notice is the bug fix. But because of this more serious change, it will instead be a minor version update.