Update package requirements

[marcomangano]

Purpose

This PR updates the minimum packages requirements and version of pyXDSM based on this GitHub issue

Expected time until merged

Type of change

• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (non-backwards-compatible fix or feature)
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no API changes)
• Documentation update
• Maintenance update
• Other (please describe)

Testing

Checklist

• I have run flake8 and black to make sure the Python code adheres to PEP-8 and is consistently formatted
• I have formatted the Fortran code with fprettify or C/C++ code with clang-format as applicable
• I have run unit and regression tests which pass locally with my changes
• I have added new tests that prove my fix is effective or that my feature works
• I have added necessary documentation

[marcomangano]

It looks like technically Numpy 1.21 does not support python 3.11? Probably on our docker images it works just fine, but in this action environment something in the wheel does not build correctly

[A-CGray]

We should probably just change the matrix to test numpy 1.21 with python 3.9 and numpy 1.25 with python 3.11, rather than all 4 combinations

[A-CGray]

@eirikurj looks like github is still requiring the python 3.8 flake8 check to pass, but we removed it here, I don't think I have the permissions to change the required checks, can you do it?

[eirikurj]

@A-CGray I have updated the requirements. Removed 3.8 and added 3.11. Feel free to merge it when ready.