Support and test Python 3.13 and 3.14

[tomasr8]

Hi, I'm wondering whether this project supports 3.13 and 3.14? If so, it'd be nice to add the corresponding PyPI classifiers and add both versions to the CI test matrix.

Happy to send a PR if this is desired!

[roycaihw]

Thanks @tomasr8! Yes PR is welcome!

/assign @tomasr8