feat: upgrade @testing-library/react from 15.0.7 to 16.0.0 (#214)

Snyk has created this PR to upgrade @testing-library/react from 15.0.7 to 16.0.0.

See this package in npm:
@testing-library/react

See this project in Snyk:
https://app.snyk.io/org/nodeshift-agg/project/63543855-c8af-438d-9aa9-ce9af390b39e?utm_source=github&utm_medium=referral&page=upgrade-pr

Co-authored-by: snyk-bot <[email protected]>

Author: lholmquist

frontend/package-lock.json

@@ -6,7 +6,7 @@
   "private": true,
   "dependencies": {
     "@testing-library/jest-dom": "^6.4.5",
-    "@testing-library/react": "^15.0.7",
+    "@testing-library/react": "^16.0.0",
     "@testing-library/user-event": "^14.5.2",
     "react": "^18.3.1",
     "react-dom": "^18.3.1",