Sync GraphQL version with Parse Server 4.4

Author: Tomek Wiszniewski

package.json

@@ -45,7 +45,7 @@
     "create-react-class": "15.7.0",
     "csurf": "1.11.0",
     "express": "4.17.1",
-    "graphql": "14.6.0",
+    "graphql": "15.3.0",
     "history": "4.10.1",
     "immutable": "4.0.0-rc.9",
     "immutable-devtools": "0.1.5",