Pfctl-exporter

Fixed

- Fixed bug where interfaces with `set skip` were not parsed correctly
- Fixed parsing of a few lines of non-numeric `pfctl -vvs info` output

Added

- Parse `pfctl -vvs Tables` output into `pfctl_table_*` metrics.

git push origin v0.4.0

Upload new release to pypi:
rm dist/*
python -m build
twine upload dist/pfctl_exporter*

Back to development:
- Update changelog again, commit and push.

Added

- Parse `pfctl -vvs Interfaces` output into metrics.

Changed

- Installed executable is now `pfctl-exporter` instead of `pfctl_exporter`

- Initial release. Only `pfctl -vvs info` metrics are parsed for now. Largely untested.


Creating a release
====================

Update release date and version in changelog.md and commit.

Then tag the new release:
git tag v0.4.0 -a