Skip some uses of packaging's PEP440 version for non-Python versions. #21639
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Version numbers from non-Python packages don't have to follow PEP440,
and there are at least a few cases where we can check for string
equality (when we don't need ordering) or rely on the library's own
version parsing (qt).
PR Summary
PR Checklist
Tests and Styling
pytest
passes).flake8-docstrings
and runflake8 --docstring-convention=all
).Documentation
doc/users/next_whats_new/
(follow instructions in README.rst there).doc/api/next_api_changes/
(follow instructions in README.rst there).