Clarify license

[hegjon]

https://github.com/avibrazil/autorsync/blob/main/setup.py#L41 says:

`"License :: OSI Approved :: GNU Library or Lesser General Public License (LGPL)",

Github says:

GPL-3.0 license

PyPi says:

License: GNU Library or Lesser General Public License (LGPL)

Header in LICENSE file:

GNU GENERAL PUBLIC LICENSE
Version 3

, but there are some text about?

YouTube Podcast  Copyright (C) 2020  BecauseOfProg

[avibrazil]

This should be all GPL 3.