Have added the ability to use format the version of the package using
the `version_format` option. While doing this I have also done some
refactoring of the module to remove the if/else if/... block and replace
it with an iterator. This should make fix some edge cases where versions
are not correctly picked up due to other files an example would be a
python project that has a `pyproject.toml` file but using the
`setup.cfg` for the package version. It should also make it easier to
make the order of the list configurable in the future.
