Fix failing tests / CI pipeline

Hey anybody!

I've tried to get this working before but it's unfortunately not trivial. The module is tested with Behat (which has my preference because most of the module happens in the UI and Behat is easier to read than PHPUnit functional tests), but I have not been able to get Behat working within GitLab CI.

As an additional developer experience challenge, this module depends on a compiled JavaScript package that consumes the Yoast SEO library, creates the widget and wraps it in a composer.json: https://github.com/Kingdutch/RTSEO.js. This was originally included within the module itself but was split out in #2726871: External library included without exception approval from the Licensing Working Group → . The module and the JavaScript it depends on are currently worked on and versioned separately.

My goal is to move both packages into a monorepository in https://github.com/Kingdutch/drupal-real-time-seo which would include GitHub workflows to do perform the Behat testing (since that's something that I know how to set up trivially). The module code would then be brought back into GitLab through a subtree split so that it can be distributed through Drupal's Packagist.

That would allow the module and the JavaScript to be versioned in lockstep and allow changes to either to be immediately tested together using automated tests.