PyPI release 0.4.2

[lachmanfrantisek]

Hello!

I just took the maintenance of this package in Fedora (let me know if you need anything..;) and it looks like we still don't have 0.4.2 because we rely on sources from PyPI. Could someone (probably @timofurrer) release it there?

(In our projects, we use this GitHub action to do it automatically -- I can send a PR if you want.)

Thanks in advance!
František