Bump @types/supertest from 2.0.16 to 6.0.0

Bumps [@types/supertest](https://github.com/DefinitelyTyped/DefinitelyTyped/tree/HEAD/types/supertest) from 2.0.16 to 6.0.0.
- [Release notes](https://github.com/DefinitelyTyped/DefinitelyTyped/releases)
- [Commits](https://github.com/DefinitelyTyped/DefinitelyTyped/commits/HEAD/types/supertest)

---
updated-dependencies:
- dependency-name: "@types/supertest"
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -19,7 +19,7 @@
     "@types/node": "^20.10.5",
     "@types/pino-http": "^5.8.2",
     "@types/polka": "^0.5.7",
-    "@types/supertest": "^2.0.16",
+    "@types/supertest": "^6.0.0",
     "@typescript-eslint/eslint-plugin": "^5.60.1",
     "@typescript-eslint/parser": "^5.62.0",
     "eslint": "^8.56.0",