Migrate packaging from setup.py to pyproject.toml file

[rndubs]

Closes #27 #28 .

Summary of changes:

• Replaced setup.py with pyproject.toml configuration, and migrated as much of the setup.cfg to the toml file as possible (flake8 config left in place)
• Switched from versioneer to setuptools-scm for dynamic versioning
• Updated CI/CD workflows with current action versions and updated the Python version matrix for testing
• Bumped dependency versions for pre-commit hooks and addressed compatibility issues
• Updated MANIFEST.in to exclude development files from source distributions
• Fixed linting warnings and type hints introduced by dependency updates

[rndubs]

@brandonwillard , this PR should be ready for a review as well.

[brandonwillard]

Thanks, again, @rndubs!