Update dependency newman to v5.2.2

Author: renovate-bot

realworld/backend/package-lock.json

@@ -38,7 +38,7 @@
   },
   "devDependencies": {
     "cross-env": "7.0.2",
-    "newman": "5.2.1",
+    "newman": "5.2.2",
     "nodemon": "2.0.6"
   }
 }