Merge branch '3515239-cloning-error-for' into '2.0.x'

Issue #3515239: get base paragraph fields

See merge request !57

src/DeepCloningTrait.php

@@ -219,7 +219,7 @@ trait DeepCloningTrait {
       && $entity_field->getSetting('target_type') == 'paragraph'
     ) {
       $paragraph_storage = \Drupal::entityTypeManager()->getStorage('paragraph');
-      $default_fields = \Drupal::service('entity_field.manager')->getFieldDefinitions('paragraph', NULL);
+      $default_fields = \Drupal::service('entity_field.manager')->getBaseFieldDefinitions('paragraph');
       foreach ($value as $key => $item) {
         // createDuplicates() creates a duplicate with the same parent_id.
         // Our duplicate needs to be independent of original inline block id.