multimedia/gaupol: Update 1.16 => 2.0
Port changes (follow upstream):
- Replace gspell with libspelling.
- Switch from Python setuptools to Makefile.
- Remove NLS option since msgfmt is always required.
Changelog:
https://github.com/otsaloma/gaupol/releases/tag/2.0
Reported by: repology
Approved by: osa, vvd (Mentors, implicit)