[BRLTTY] Support multiple Python versions on Windows

[Samuel Thibault]

Hello,

Samuel Thibault, le jeu. 28 sept. 2023 01:28:01 +0200, a ecrit:
> Samuel Thibault, le jeu. 28 sept. 2023 01:26:57 +0200, a ecrit:
> > Apparently cython3 introduced some support for it, so it will be worth
> > trying it indeed.
> 
> (namely: CYTHON_LIMITED_API, that makes cython use the stable ABI)

I tried it, it seems to be working indeed. I have submitted the change
on

https://github.com/brltty/brltty/pull/429

Samuel