fix: upgrade serve-handler from 6.1.2 to 6.1.5

Snyk has created this PR to upgrade serve-handler from 6.1.2 to 6.1.5.

See this package in npm:
https://www.npmjs.com/package/serve-handler

See this project in Snyk:
https://app.snyk.io/org/sammytezzy/project/2207d71a-9e28-4437-9f44-7b6c1fa3c0c3?utm_source=github&utm_medium=referral&page=upgrade-pr

Author: snyk-bot

serve/package-lock.json

@@ -3,6 +3,6 @@
     "start": "node index.js"
   },
   "dependencies": {
-    "serve-handler": "^6.1.2"
+    "serve-handler": "^6.1.5"
   }
 }