Add python 3.11 to automated tests

[d33bs]

Description

This PR adds Python 3.11 to automated tests in an effort to align testing with what's found in the pyproject.toml file. I discovered this in working towards Python 3.12 compatibility as part of #157 which will also eventually require a similar change.

Thanks for any feedback you may have!

What is the nature of your change?

• [ ] Bug fix (fixes an issue).
• [x] Enhancement (adds functionality).
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected).
• [ ] This change requires a documentation update.

Checklist

Please ensure that all boxes are checked before indicating that a pull request is ready for review.

• [x] I have read the CONTRIBUTING.md guidelines.
• [x] My code follows the style guidelines of this project.
• [x] I have performed a self-review of my own code.
• [ ] I have commented my code, particularly in hard-to-understand areas.
• [ ] I have made corresponding changes to the documentation.
• [x] My changes generate no new warnings.
• [x] New and existing unit tests pass locally with my changes.
• [ ] I have added tests that prove my fix is effective or that my feature works.
• [x] I have deleted all non-relevant text in this pull request template.

[d33bs]

Thank you @gwaybio and @kenibrewer ! Merging this in.