New comment by paper42 on void-packages repository

https://github.com/void-linux/void-packages/pull/34299#issuecomment-983085786

Comment:
* switch to the github tarball as and add pytest to checkdepends as I mentioned in https://github.com/void-linux/void-packages/pull/34299#discussion_r759562143
* import this patch to fix the one failing test https://github.com/sciunto-org/python-bibtexparser/commit/5f98bac62e8ff3c8ab6b956f288f1c61b99c6a5d
* do not override do_check