bump graphql version

Author: jonathanhaviv

package-lock.json

@@ -34,7 +34,7 @@
   "license": "Apache-2.0",
   "dependencies": {
     "commander": "2.20.3",
-    "graphql": "14.5.8",
+    "graphql": "15.8.0",
     "lodash": "4.17.19",
     "postman-collection": "3.5.5"
   },