Merge branch '5.4' into 6.3

* 5.4:
  [WebProfilerBundle] Fix JS error when evaluating scripts
  don't fail when optional dependencies are not present
  fix syntax error on PHP 7.2

Normalizer/AbstractNormalizer.php

@@ -450,7 +450,7 @@ protected function instantiateObject(array &$data, string $class, array &$contex
                 sprintf('Failed to create object because the class "%s" is not instantiable.', $class),
                 $data,
                 ['unknown'],
-                $context['deserialization_path'] ?? null,
+                $context['deserialization_path'] ?? null
             );
         }