Working with python version newer than 3.10

[jnboehm]

Thanks for putting this library together.

I wanted to use pyffi to play around a bit but unfortunately it does not appear to work with versions other than 3.10. Is there some limitation behind it or would it suffice to point pyffi to the 3.11 library? Maybe that could also be reflected in the documentation then.

If there is more work necessary, then I would be willing to look into it (though I don't have much prerequisite knowledge).

Cheers!