fix: Move configuration information into pyproject.toml

[cclauss]

Migrate the contents of requirements_dev.txt, setup.cfg, and setup.py into pyproject.toml

• https://packaging.python.org/en/latest/tutorials/packaging-projects
• https://setuptools.pypa.io/en/latest/userguide/pyproject_config.html
• Add a gyp --version test to our Python GitHub Action

This PR is required because release-please does not recognize chore: prefix in #175 despite that prefix being recommended in https://www.conventionalcommits.org and release-please creates chore: pull requests.

If this does not work, let's upgrade to https://github.com/pypa/gh-action-pypi-publish