Update dependency helmet to v8 (#7)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -51,7 +51,7 @@
     "cors": "^2.8.5",
     "eslint": "^9.0.0",
     "express": "^4.19.2",
-    "helmet": "^7.1.0",
+    "helmet": "^8.0.0",
     "light-my-request": "^6.6.0",
     "morgan": "^1.10.0",
     "neostandard": "^0.12.0"