Using "min" option without setting the "allowEmptyString" is deprecated (#765)

Author: divya-intelli

tests/modules/apigee_edge_test/src/Entity/OverriddenDeveloperApp.php

@@ -39,6 +39,7 @@ public static function baseFieldDefinitions(EntityTypeInterface $entity_type): a
       'Length' => [
         'min' => 1,
         'max' => 30,
+        'allowEmptyString' => TRUE
       ],
     ]);