- GitLab CI.
- Refresh pre-commit checks.
- Address some issues.

Keep Python 2.7 around, although not supported I can't pretend it's not
in use.

Update documentation accordingly.

- Removed useless pre-commit checks.
- Added Travis CI test, badge to README.
- Added pre-commit test for outdated requirements.

- Renamed ansible-pre-commit to ansible-syntax-check in preperation for adding another hook, updated hooks.yml and README accordingly.

- Bumped patch version.

- Bump minor version.

- Changed license to MIT.