Add '_source_include', '_source_exclude', 'pipeline' params to Bulk whitelist

Author: polyfractal

src/Elasticsearch/Endpoints/Bulk.php

@@ -66,7 +66,10 @@ public function getParamWhitelist()
             'type',
             'fields',
             'pipeline',
-            '_source'
+            '_source',
+            '_source_include',
+            '_source_exclude',
+            'pipeline'
         );
     }