Deprecations and future problems

[zerothi]

Currently one cannot compile Inelastica with newer versions of numpy.

• numpy.complex is deprecated (to not overwrite default complex)
  Instead one should use numpy.complex_ if really needed
• numpy.distutils will be removed in Python >= 3.12 releases, possibly one should move to scikit-build or something similar to account for these problems... :(

I am trying to do this in sisl. But are having some issues at the moment. Hopefully they should be fixed asap!

[zerothi]

My latest sisl commits have omitted the numpy.distutils problem. So you can take the CMakeLists.txt files from there to make it work for newer Python releases.