[ Drupal_10 ] The core: 8.x key must not be used here.

Problem/Motivation

Adding both core and core_version_requirement with anything other than core_version_requirement: ^8 || ^9 will result in an exception. This is not valid because the core: key would include versions that do not recognize the core_version_requirement: key.

Steps to reproduce

For example, a theme that is compatible with Drupal 8 versions after Drupal 8.8.0 and also Drupal 9 will need an info.yml file like this:

name: My Module
type: module
core_version_requirement: ^8 || ^9 || ^10