PineAPPL Python API for 3.13

[scarlehoff]

At the moment the version of pyo3 is pinned to 0.21

pineappl/pineappl_py/Cargo.toml

Line 34 in 13653df

pyo3 = { features = ["extension-module"], version = "0.21.2" }

support for 3.13 was added only in 0.22 (and for free-threaded 3.13, 0.23; I'd like to play with that if possible but it's not really that important).

[cschwan]

Until recently the problem was the numpy crate, which required PyO3 0.21.x, but it was recently upgraded to support higher version numbers. I believe if you raise both PyO3 and numpy versions you should be able to build for Python 3.13. Have a look at #299, which supports Python 3.13 out-of-the box (but it changes the Python API). You may need to fix a few more things described here.