Dropping support for python 3.8 and adding 3.11

[anissa111]

PR Summary

Closes #422

Fixes CI failures on main due to dropped support of 3.8 by dependencies and adds support for python 3.11

Summary of changes:

• removes python 3.8 from supported versions
• limits highest supported version to <=3.11

After this PR is merged:

• I will go into the repo settings and add the 3.11 tests to the required list
• Corresponding changes will need to be made in the feedstock repo at the time of the next release

PR Checklist

General

• Make an issue if one doesn't already exist
• Link the issue this PR resolves by adding closes #XXX to the PR description where XXX is the number of the issue.
• Add a brief summary of changes to docs/release-notes.rst
• Add appropriate labels to this PR
• Make your changes in a forked repository rather than directly in this repo
• Open this PR as a draft if it is not ready for review
• Convert this PR from a draft to a full PR before requesting reviewers
• Passes precommit. To set up on your local, run pre-commit install from the top level of the repository. To manually run pre-commits, use pre-commit run --all-files and re-add any changed files before committing again and pushing.

[anissa111]

Okay, the required tests on branch protection should be updated!