Exaile 4.2.1-beta1 released

[Johannes Sasongko]

This is a fairly small release, with the most important change being
that it fixes the Plugins preferences page when running on Python >= 3.14.

Full release notes:
https://github.com/exaile/exaile/wiki/Exaile-4.2-release-notes

Downloads: https://github.com/exaile/exaile/releases/tag/4.2.1-beta1

For package maintainers:

`make install` now also installs precompiled Python modules
(`**/__pycache__/*.pyc` files). Earlier versions of Exaile did this as
well, but it regressed when Python added `__pycache__` directories and
removed `.pyo` files.

Please do get in touch if you have particular needs regarding these
files that we can help with.

Cheers,
Johannes