Update dependencies

[lindsay-stevens]

Why is this the best possible solution? Were any other approaches considered?

Last update >6 months ago. Did not update to xlrd==2.0.2 since the change there seemed like it might be dubious or unnecessary (added new XLS binary test file, no changes to the project for 4 years before that, and the change relates to formula handling which probably isn't relevant to pyxform, probably about time to deprecate XLS anyway). Updated the default dev version from py3.10 to py3.12 to match pyodk - the supported range remains py3.10 thru 3.13.

Also applied new or updated ruff linter rules: sort slot names, use dict.fromkeys instead of k: None comps, collapse adjacent strings, update % string formats to f-strings, etc.

What are the regression risks?

Library users that have dependencies conflicting with the new pinned versions - more so openpyxl than the dev deps.

Does this change require updates to documentation? If so, please file an issue here and include the link below.

No, but the readme was updated.

Before submitting this PR, please make sure you have:

• included test cases for core behavior and edge cases in tests
• run python -m unittest and verified all tests pass
• run ruff format pyxform tests and ruff check pyxform tests to lint code
• verified that any code or assets from external sources are properly credited in comments