- Remove mention of tests/requirements.yml from the Requirements section in the README, relevant only for testing.

accordingly.

- Add pre-commit check for out-of-date dependencies.
- Add flake8 pre-commit check.
- List roles needed for testing (bootstraping) at
tests/requirements.yml, leave other dependencies at meta/main.yml.
- Update molecule.yml, ansible.cfg for newer versions of Molecule.
- Update documentation, playbook accordingly.

  how to install roles.
- Corrected privilege escalation in tests, added example.

  the CA bundle from LibreSSL and is in the base OS. The update is already from
the same upstream.
- Better parsing and cleaning of certificate name, therefore the cerificates
  under /usr/share/ca-certificates are more properly names (not just numbered)
in OpenBSD.
- Use openssl certhash in OpenBSD instead of reimplementing the logic. Only
  available in 5.7 or later, added assertion for that.
- Updated TODO list, tests accordingly.