Update hydrotools.events to newer Python versions

[jarq6c]

This PR updates the hydrotools.events package to test on Python versions 3.9, 3.10, and 3.11. It also transitions the package from using a setup.cfg to just using pyproject.toml. This also update the GH actions per https://github.blog/changelog/2023-06-13-github-actions-all-actions-will-run-on-node16-instead-of-node12-by-default/

Additions

Removals

• setup.cfg

Changes

• pyproject.toml

Testing

1. No changes.

Notes

• Last version under old DOC license.
• Related to Update automated testing #259 and Provisional LICENSE Update #260

Todos

Checklist

• PR has an informative and human-readable title
• PR is well outlined and documented. See #12 for an example
• Changes are limited to a single goal (no scope creep)
• Code can be automatically merged (no conflicts)
• Code follows project standards (see CONTRIBUTING.md)
• Passes all existing automated tests
• Any change in functionality is tested
• New functions are documented (with a description, list of inputs, and expected output) using numpy docstring formatting
• Placeholder code is flagged / future todos are captured in comments
• Reviewers requested with the Reviewers tool ➡️

[jarq6c]

Added 3.12 as a unit test environment, since it appears that Miniconda supports 3.9 - 3.12.

[jarq6c]

Superseded by #263