community/py3-itsdangerous: upgrade to 2.0.1 and modernize
Follow-up to !21490 (merged) community/py3-itsdangerous: upgrade to 2.0.0 was not applied
fixes aarch64 builder build-edge-aarch64/testing/py3-flask-migrate/py3-flask-migrate-3.0.0-r0.log
Edited by Andy Postnikov