[PEP 440 version specifiers]: https://peps.python.org/pep-0440/#version-specifiers
[PEP 508]: https://peps.python.org/pep-0508/
[PEP 517]: https://peps.python.org/pep-0517/
[PEP 621]: https://peps.python.org/pep-0621/
[PEP 631]: https://peps.python.org/pep-0631/
[PEP 639]: https://peps.python.org/pep-0639/
[PEP 660]: https://peps.python.org/pep-0660/
[PEP 665]: https://peps.python.org/pep-0665/
