Issue #3209141 by Pierre Paul Lefebvre, paulocs:...

Issue #3209141 by Pierre Paul Lefebvre, paulocs: \Drupal::service('file_system')->scanDirectory is not available for Drupal < 8.8

libraries.info.yml

 name: Libraries
 type: module
 description: Allows version-dependent and shared usage of external libraries.
-core: 8.x
-core_version_requirement: ^8 || ^9
+core_version_requirement: ^8.8 || ^9

tests/modules/libraries_test/libraries_test.info.yml

 name: Libraries test module
 type: module
 description: Tests library detection and loading.
-core: 8.x
 core_version_requirement: ^8 || ^9
 dependencies:
   - libraries:libraries