Build and publish Python distributions to PyPI Node.js 12 actions are
deprecated. For more information see:
https://github.blog/changelog/2022-09-22-github-actions-all-actions-will-begin-running-on-node16-instead-of-node12/. Please
update the following actions to use Node.js 16: actions/setup-python,
actions/setup-python

update github action to latest

GitHub CI no longer has a way to test it

The job is failing to find pypy3.6

update python support

Use a filter condition function to check whether we want to traverse
each node.

Replace the use of the deprecated traverse() method with findall().

Add a test showing that the `only` directive works for ignoring
sections of content that has content that should not be checked.

Addresses #204

add test showing that only directive works for ignoring blocks

- Replace setup.py, setup.cfg, and requirements.txt with
  pyproject.toml.
- Use setuptools_scm instead of pbr.

modernize packaging

add dependabot config for github actions