Update composer.json for proper Drupal core version compatibility

I don't think core_version_requirement is needed to be added in composer.json file.

I also suggest following this document to create a good branch name: https://www.drupal.org/docs/develop/git/using-gitlab-to-contribute-to-dr... →

Anyways, thanks for your time. I'm closing this and making a new release for d11.

abhisekmazumdar → closed merge request !3