Python 3.13

The PyO3 used here seems to not support python 3.13: ``` --- stderr error: the configured Python interpreter version (3.13) is newer than PyO3's maximum supported version (3.12) = help: please check if an updated version of PyO3 is available. Current version: 0.21.2 = help: set PYO3_USE_ABI3_FORWARD_COMPATIBILITY=1 to suppress this check and build anyway using the stable ABI ```