Version parsing have moved to separate package, tests fail with modern setuptools

[NHOrus]

Duplicate of #61 but this time actually a problem, see setuptools changelog https://setuptools.pypa.io/en/latest/history.html#v82-0-0

[hughsie]

@NHOrus do you have a suggestion or PR perhaps please?

[NHOrus]

#120 works perfectly fine