[fix][vendor] Contracts only available since Symfony 4.2 (use of 'Symfony\Contracts\Translation\TranslatorInterface')

Author: dsavina

composer.json

@@ -19,7 +19,7 @@
   "require" : {
     "php" : ">=7.2",
     "thecodingmachine/graphqlite" : "^4.1",
-    "symfony/validator": "^4 | ^5",
+    "symfony/validator": "^4.2 | ^5",
     "doctrine/annotations": "^1.6"
   },
   "require-dev": {