[HOTFIX] Make inteface compatible to method definition

Author: jgrehling

library/Zend/Session/SaveHandler/Interface.php

@@ -39,7 +39,7 @@ interface Zend_Session_SaveHandler_Interface
      * @param string $save_path
      * @param string $name
      */
-    public function open($save_path, $name);
+    public function open(string $save_path, string $name);
 
     /**
      * Close Session - free resources