Bump @testing-library/jest-dom from 5.11.0 to 5.11.4 in /frontend

Bumps [@testing-library/jest-dom](https://github.com/testing-library/jest-dom) from 5.11.0 to 5.11.4.
- [Release notes](https://github.com/testing-library/jest-dom/releases)
- [Changelog](https://github.com/testing-library/jest-dom/blob/master/CHANGELOG.md)
- [Commits](testing-library/jest-dom@v5.11.0...v5.11.4)

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -3,7 +3,7 @@
   "version": "0.1.0",
   "private": true,
   "dependencies": {
-    "@testing-library/jest-dom": "^5.11.0",
+    "@testing-library/jest-dom": "^5.11.4",
     "@testing-library/react": "^10.4.9",
     "@testing-library/user-event": "^12.0.11",
     "react": "^16.13.1",