fix: upgrade helmet from 5.0.2 to 5.1.0

Snyk has created this PR to upgrade helmet from 5.0.2 to 5.1.0.

See this package in npm:
https://www.npmjs.com/package/helmet

See this project in Snyk:
https://app.snyk.io/org/mystikfluu/project/a0cb5db3-5314-4f12-be9d-493a8475edd5?utm_source=github&utm_medium=referral&page=upgrade-pr

package.json

@@ -6,7 +6,7 @@
     "express": "^4.18.1",
     "express-fileupload": "^1.3.1",
     "express-useragent": "^1.0.15",
-    "helmet": "^5.0.2",
+    "helmet": "^5.1.0",
     "mysql": "^2.18.1",
     "ws": "^8.6.0"
   }