fix(deps): update dependency openapi-backend to v5.3.0 (#308)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

packages/api-mock/package.json

@@ -29,7 +29,7 @@
     "cors": "2.8.5",
     "express": "4.17.3",
     "nanoid": "3.3.1",
-    "openapi-backend": "5.2.1",
+    "openapi-backend": "5.3.0",
     "yargs": "17.3.1"
   },
   "devDependencies": {