multimedia/py-guessit: update to 3.2.0

• Add python 3.9 support, drop python 2.7 support
• Fix: Use rebulk 3+ to have regex module disabled by default

Changelog: https://github.com/guessit-io/guessit/blob/develop/CHANGELOG.md

PR: 252201
Submitted by: Andrej Ebert <andrej@ebert.su>
Approved by: arrowd, tcberner (mentors, implicit)