2021-10-15

• More portable architecture detection
  (inspired by the discussion https://discuss.ocaml.org/t/a-zoo-of-values-for-system/8525
  initiated by Olaf Hering, with helpful comments from Daniel Bünzli,
  @EduardoRFS, David Allsopp, kit-ty-kate and jbeckford)

• Better compatibility with Windows

• Correct version detection for Python 3.10