Add support for Python 3.13

[hagenw]

Adds Python 3.13 as supported version to the Python package and enables tests for it in Ubuntu runners.

Summary by Sourcery

Add support for Python 3.13 by updating the project configuration and enabling CI tests for this version on Ubuntu runners.

Enhancements:

• Add support for Python 3.13 in the project configuration.

CI:

• Enable testing for Python 3.13 on Ubuntu runners.

[sourcery-ai]

Reviewer's Guide by Sourcery

This PR adds Python 3.13 support by updating the CI workflow configuration and package metadata. The changes are straightforward, only requiring additions to version lists in configuration files.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Add Python 3.13 to the CI workflow matrix	Added '3.13' to the python-version matrix array for testing across all supported operating systems	.github/workflows/test.yml
Update package metadata to declare Python 3.13 support	Added Python 3.13 classifier to the package classifiers list	pyproject.toml

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[sourcery-ai]

Hey @hagenw - I've reviewed your changes - here's some feedback:

Overall Comments:

• Adding support for Python 3.13 seems premature as it's still in development and not yet released. Consider waiting until at least an alpha/beta release is available to avoid potential compatibility issues with the final release.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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[hagenw]

This is currently blocked until numba 0.61 is released, see numba/numba#9413.

numba is a dependency of librosa, which we use as an example in the documentation.