Update python test versions

[lioman]

• add 3.12
• remove 3.7 since it is out of support
• use 3.11 as stable base version for linter and docs

Pull Request Checklist

Resolves: #issue-number-here

• Ensured tests pass and (if applicable) updated functional test output
• Conformed to code style guidelines by running appropriate linting tools
• Added tests for changed code
• Updated documentation for changed code

[lioman]

Ok this pr is probably a bit ahead of time. 3.12 is just released and GitHub has not updated their available python versions yet.

[pauloxnet]

It can be better to have two separate PRs: one to remove outdated Python versions and one to add Python 3.12 support (which maybe Github will provide in the meantime).

[justinmayer]

We should probably also remove all other references to Python 3.7. Some of the ones I found are:

• setup.py
• pyproject.toml
• docs/contribute.rst
• docs/install.rst
• docs/quickstart.rst

Regarding the latter three places in the docs, I think we should choose one canonical place to document the minimum supported Python version, and then link to that from other places so that every time a Python version goes EOL we can minimize the number of changes we have to make.

[lioman]

Good idea - I will try to get this done

[lioman]

I close this in favor of #3199 and another yet to be created one