Add jms/serializer-bundle because of The service "twig" has a depende…

…ncy on a non-existent service "jms_serializer.twig_extension.serializer". Did you mean one of these: "jms_serializer.twig_extension.runtime_serializer", "jms_serializer.twig_extension.serializer_runtime_helper"?

composer.json

@@ -19,6 +19,7 @@
         "babdev/pagerfanta-bundle": "^3.8",
         "behat/behat": "^3.12",
         "doctrine/doctrine-bundle": "^2.10",
+        "jms/serializer-bundle": "^4.2",
         "lexik/jwt-authentication-bundle": "^2.16",
         "matthiasnoback/symfony-config-test": "^4.3",
         "matthiasnoback/symfony-dependency-injection-test": "^4.3",