Create 2.0.0-beta1 release

New release:

https://www.drupal.org/project/quantcdn/releases/2.0.0-beta1 →

I made sure these branches are all in sync between GitLab and GitHub:

• 1.x
• 2.x
• 8.x-1.x

The only differences between 1.x and 2.x are related to Drupal 11 compatibility, phpcs, deprecations, and the views exposed filter warning (which could be backported but not a big feature/improvement).

1.x and 8.x-1.x are the same.

An RC release can happen after this GitHub PR is merged:

https://github.com/quantcdn/drupal/pull/238

and then we'll switch to only working on the 2.x branch.

Just noticed a linting error but it's fixed in dev now so it'll make it into the next release.

Add list of issues.