Validate vers qualifier

[jaimergp]

Goes with package-url/purl-spec#433

[pombredanne]

@jaimergp Thanks! can you add a few simple unit tests?

[jaimergp]

@pombredanne, done!

[mprpic]

LGTM!

[jaimergp]

The mypy errors are external to this PR. We are now importing univers, which doesn't feature the py.typed marker file, so mypy complains it won't infer types from that package.

The solution is to add type hints to universe or ignore the import here. Thoughts @pombredanne @mprpic?

[jaimergp]

As discussed in today's meeting with @pombredanne, I added aboutcode-org/univers#159 to tame the CI here, which is the simplest PR possible to fix this and let mypy infer things in univers.

[jaimergp]

aboutcode-org/univers#159 was merged a while ago, we just need a new univers release in PyPI and the CI will be green here.

[jaimergp]

@mprpic @pombredanne - is there anything I can do to request a release for univers so we can get this CI green and then push a packageurl-python release? Thank you! 🙏

[TG1999]

@jaimergp https://github.com/aboutcode-org/univers/tree/v31.1.0 tag and https://github.com/aboutcode-org/univers/releases/tag/v31.1.0 release on GH are ready, will reflect on Pypi on a few.