www/py-flask-compress: update to 1.3.2

• Add |make test| support
• Define LICENSE_FILE
• Switch WWW to PyPI (CHEESESHOP)

Changes: https://github.com/libwilliam/flask-compress/compare/v1.3.1...v1.3.2
PR: 215189
Approved by: Andrej Ebert (maintainer)