Merge pull request #115 from bolt/fix/carbon_function_to_save_datetime_contenttype

Fixing Carbon function to save field type date of contenttype

Author: bobdenotter

src/EventSubscriber/ContentTypePersister.php

@@ -93,7 +93,7 @@ private function setContentFields(Content $content, Form $form, PostSubmitEvent
             }
 
             if ($value instanceof \DateTimeInterface) {
-                $value = Carbon::createFromInterface($value);
+                $value = Carbon::instance($value);
             }
 
             $value = (string) $value;