Drop python 3.8, add python 3.13, allow numpy 2.x

[ddelange]

help wanted! this is failing and I don't have time to debug.

for python 3.13 support, the build system needs to be compatible with numpy 2.1

despite buildtime needing numpy 2.x, the runtime dependency can theoretically still allow numpy 1.x (see diff).

close #2425

• python 3.7 - 3.12 can be supported with numpy v1 build-system
• python 3.9 - 3.13 can be supported with numpy v2 build-system

ref scipy/oldest-supported-numpy#86

[ddelange]

not sure if build fails fast on the first error (probably), but apart from a bunch of notes and warnings, here's our first candidate:

      src/vaexfast.cpp:2045:63: error: cannot convert ‘PyObject*’
      {aka ‘_object*’} to ‘const PyArrayObject*’ {aka ‘const
      tagPyArrayObject_fields*’}
       2045 |                         new_array_ptr =
      (double*)PyArray_DATA(new_array);

logs_32207007014.zip

[setu4993]

I'm guessing you meant "Drop Python 3.8" and not 3.9?

[ddelange]

Thanks, adjusted the PR title 👍