Remove support for Drupal < 9.1

This should be done once an 8.x-1.x release is made with Drupal 10 support. That'll allow Drupal 8 customers to make the jump to D10 without too much headache.

Personally I'd wait until Drupal 10 / 9.5 lands to get this in. At that point, you can make key module support the LTS version of Drupal 9 only instead of Drupal 9.1, which has been EOL longer than Drupal 8.

I don't get the change of version. The maintainer says that he wants to remove code from the new major version of the module. He's free to do whatever he wants in 4.0.x. There's no need to keep junk around in that version.

Also, key 8.x-1.16 is compatible with Drupal 10.

Talked to rlhawk at Drupalcon about versioning, and its likely a new version is not likely anytime soon due to the downstream dependencies. Thus moving this back.

As of Q2 2025, the minimum version can be safely set to Drupal 9.5 without needing to change the major version.

The patch no longer applied so I fixed it and converted it to an MR.

@ptmkenny, we should update the title, description and MR accordingly to support Drupal core >=10.3 version in 4.x version.

Update ticket to Drop support of Drupal core version below 10.3.

Keeping this intact instead created separate issue for dropping support of Drupal core below 10.3 version.
#3524922: Drop support of Drupal core below 10.3 version.

Thanks for keeping the Drupal 10 and 9 discussion separate. For 8.x-1.x, 9.1 is ok for now. I also updated the format so its easier to parse in drupalci testing. While there used to be benefits of doing the <12 format (to test betas before release) the lenient composer and drupalci issues make core_version_requirement: '^9.1 || ^10 || ^11' a better format now.