Add Python 3.13, Remove Python 3.8 and 3.9

[joshmarkovic]

Changes

• Declare Python 3.13 in classifiers
• Remove 3.8 and 3.9 support
• Enforce Ruff B905 (PEP 618 was introduced in Python 3.10)

How I tested this

Notes

Checklist

• PR has an informative and human-readable title (this will be pulled into the release notes)
• Changes are limited to a single goal (no scope creep)
• Code passed the pre-commit check & code is left cleaner/nicer than when first encountered.
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output)
• Placeholder code is flagged / future TODOs are captured in comments
• Project documentation has been updated if adding/changing functionality.

[skrawcz]

Thanks @joshmarkovic mind, removing 3.8 and 3.9 too.

[joshmarkovic]

Thanks @joshmarkovic mind, removing 3.8 and 3.9 too.

Done

[joshmarkovic]

@skrawcz build-docs is failing (for all PRs). Is there anything else I need to get this approved?

[skrawcz]

LGTM -- thanks! docs seems like permission error to push.