Bump helmet from 4.6.0 to 6.0.1

Bumps [helmet](https://github.com/helmetjs/helmet) from 4.6.0 to 6.0.1.
- [Release notes](https://github.com/helmetjs/helmet/releases)
- [Changelog](https://github.com/helmetjs/helmet/blob/main/CHANGELOG.md)
- [Commits](https://github.com/helmetjs/helmet/compare/v4.6.0...v6.0.1)

---
updated-dependencies:
- dependency-name: helmet
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -27,7 +27,7 @@
     "compression": "^1.7.4",
     "cookie-parser": "^1.4.5",
     "express": "^4.17.1",
-    "helmet": "^4.6.0",
+    "helmet": "^6.0.1",
     "https-proxy-agent": "^5.0.0",
     "minizlib": "^2.1.2",
     "node-fetch": "^2.6.5",