Add 'thread_pool_patterns' parameter to Cat\Threadpool endpoint

Author: polyfractal

src/Elasticsearch/Endpoints/Cat/ThreadPool.php

@@ -38,7 +38,8 @@ public function getParamWhitelist()
             'help',
             'v',
             'full_id',
-            'size'
+            'size',
+            'thread_pool_patterns'
         );
     }