Update GitLab CI config now that Drupal 11 is the default

Even though the test is failing, I think this should be committed because, by adding a test, it shows that the tests are failing.

I think we should allow the next minor to fail... we still get the info.

Actually if we release an 11.x compatible version we need to say we conflict with 11.1.x because we already know we do - therefore this is going to fail hard. Not sure what to do. ick.

Yeah, allowing failure makes sense; I made this MR before I realized how hard 11.1 compatibility was going to be.

I've updated the MR to block installation on 11.1 for now. I definitely think there should be an 11.0-compatible release, and hopefully an 11.1-compatible release to follow shortly after.

Automatically closed - issue fixed for 2 weeks with no activity.