Release Notes:
- Automated Spec Update (#537)
- Update Read the Docs build OS (#539)
- Automatically add content hashes to uploads (#538)
- Migrate packaging from setup.py to pyproject.toml (PEP 517/621) (#536)
- Fix client bugs: refresh retry, error parsing, clone user-agent, scope validation (#535)
- Remove redundant ply entry from requirements.txt (#533)
- Modernize GitHub Actions in coverage and spec_update workflows (#534)
- Drop six dependency and require Python 3.11+ (#532)
- Publish to PyPI via AWS Secrets Manager (OIDC) (#531)
- Fix release workflow so sdist install works under setuptools >= 82 (#530)
- Update README.rst (#529)
- Remove pytest-runner / setup.py test support (#523)
- Upgrading requirements to stone 3.3.9 (#522)
- Updating the stone version to 3.3.9 (#521)
- Adding requirements.txt into MANIFEST.in (#520)
- Fix invalid link to documentation in README.md (#519)
- Update README.rst with note about server certificate changes (#514)
- Update updown.py (#477)