build(deps): bump query-string from 6.14.1 to 9.0.0 in /frontend

Bumps [query-string](https://github.com/sindresorhus/query-string) from 6.14.1 to 9.0.0.
- [Release notes](https://github.com/sindresorhus/query-string/releases)
- [Commits](sindresorhus/query-string@v6.14.1...v9.0.0)

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

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

frontend/package.json

@@ -19,7 +19,7 @@
 		"@testing-library/react": "^12.1.2",
 		"@testing-library/user-event": "^7.2.1",
 		"js-cookie": "^2.2.1",
-		"query-string": "^6.14.1",
+		"query-string": "^9.0.0",
 		"react": "^16.14.0",
 		"react-alice-carousel": "^2.5.1",
 		"react-dom": "^16.14.0",