Bump supertest from 6.2.4 to 7.0.0 in /frontend

Bumps [supertest](https://github.com/ladjs/supertest) from 6.2.4 to 7.0.0.
- [Release notes](https://github.com/ladjs/supertest/releases)
- [Commits](ladjs/supertest@v6.2.4...v7.0.0)

---
updated-dependencies:
- dependency-name: supertest
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

frontend/package.json

@@ -98,7 +98,7 @@
     "react-hot-loader": "^4.13.0",
     "react-test-renderer": "^18.2.0",
     "source-map-loader": "^4.0.0",
-    "supertest": "^6.2.3",
+    "supertest": "^7.0.0",
     "webpack": "^5.76.2",
     "webpack-cli": "^4.10.0",
     "webpack-config-utils": "^2.3.1",