Is D9 Supported?

Problem/Motivation

Currently the project page shows that D9 is still supported, but the info.yml prevents the module from being enabled.

That is because it is reading https://git.drupalcode.org/project/entity_reference_revisions/-/blob/8.x...

This enables Composer to install the module, but when you try to use it you get a `Unable to install modules: module 'entity_reference_revisions' is incompatible with this version of Drupal core.` error. because of https://git.drupalcode.org/project/entity_reference_revisions/-/blob/8.x...

9 will still listed when 11 was added in https://git.drupalcode.org/project/entity_reference_revisions/-/commit/4...

9 was removed in https://git.drupalcode.org/project/entity_reference_revisions/-/commit/1... for ✨ Orphan Purger not triggered when deleting revisions Needs review , but I don't know why.

Steps to reproduce

This is easy to reproduce...

1. In a clean D9 install, run composer require 'drupal/entity_reference_revisions:^1.12'
2. run drush en entity_reference_revisions

Proposed resolution

I don't really care if D9 is supported or not, but the versions in the composer.json and info.yml should match.