Update Twig to v2.15.4

system/libs/Twig/Extension/GlobalsInterface.php

@@ -21,6 +21,12 @@ namespace Twig\Extension;
  */
 interface GlobalsInterface
 {
+    /**
+     * Returns a list of global variables to add to the existing list.
+     *
+     * @return array An array of global variables
+     */
+    public function getGlobals();
 }
 
 class_alias('Twig\Extension\GlobalsInterface', 'Twig_Extension_GlobalsInterface');