Support python 3.12

[tommy-waltmann]

Description

This PR adds python 3.12 to our test matrix.

Motivation and Context

Python 3.12 was recently released, and we want to support the newest versions of python.

How Has This Been Tested?

If the existing tests pass, we are good to go.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds or improves functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation improvement (updates to user guides, docstrings, or developer docs)

Checklist:

• I have read the CONTRIBUTING document.
• My code follows the code style of this project.
• I have updated the documentation (if relevant).
• I have added tests that cover my changes (if relevant).
• All new and existing tests passed.
• I have updated the credits.
• I have updated the Changelog.

[joaander]

Thanks!

Test are passing here. There must be some issue wit the conda-forge build system and/or pinned dependencies. You can always ask on the conda-forge gitter for support: https://app.gitter.im/#/room/#conda-forge_conda-forge.github.io:gitter.im

We should drop support for Python 3.7. It reached end of life in June 2023.