games/pysolfc: Update to 2.21.0
- Although it's a beta release it adds compatibility [1] for Pillow 10.0.
Changelog:
https://github.com/shlomif/PySolFC/blob/pysolfc-2.21.0/NEWS.asciidoc
PR: 272523 [1]
Reported by: sven.a.jonsson@bahnhof.se [1]
MFH: No (beta release, Pillow >= 10 not present in 2023Q3)