The core: 8.x key must not be used here.

Hello Maintainers,
I have provided an MR !4 to fix this issue.
To get more information visit https://www.drupal.org/node/3070687 →
Please review it.

Thanks!

Would be nice if someone other than the person making the patch could review the issue 🤓

I reviewed the MR and found that 'core_version_requirement' should also be altered to core_version_requirement: ^8.8 || ^9.

-core: 8.x
-core_version_requirement: ^8 || ^9
+core_version_requirement: ^8.8 || ^9

because the key 'core_version_requirement' was not recognized before the drupal 8.7.7 version.

Added a patch to fix this issue. Please review

Ah this is 1.x.

That's not supported any more