Issue #2832999 by Steven Jones: Alter config schema for image styles

imageapi_optimize.module

@@ -48,6 +48,15 @@ function imageapi_optimize_entity_type_alter(array &$entity_types) {
   }
 }
 
+/**
+ * Implements hook_config_schema_info_alter().
+ */
+function imageapi_optimize_config_schema_info_alter(&$definitions) {
+  if (isset($definitions['image.style.*'])) {
+    $definitions['image.style.*']['mapping']['pipeline']['type'] = 'string';
+  }
+}
+
 /**
  * Implements hook_form_FORM_ID_alter().
  */