Bump @testing-library/react in /{{cookiecutter.project_slug}}/frontend (#134)

Bumps [@testing-library/react](https://github.com/testing-library/react-testing-library) from 10.4.9 to 11.0.4.
- [Release notes](https://github.com/testing-library/react-testing-library/releases)
- [Changelog](https://github.com/testing-library/react-testing-library/blob/master/CHANGELOG.md)
- [Commits](testing-library/react-testing-library@v10.4.9...v11.0.4)

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Co-authored-by: dependabot-preview[bot] <27856297+dependabot-preview[bot]@users.noreply.github.com>

Author: dependabot-preview[bot]

{{cookiecutter.project_slug}}/frontend/package.json

@@ -39,7 +39,7 @@
   "devDependencies": {
     "typescript": "^4.0.2",
     "@testing-library/jest-dom": "^5.11.1",
-    "@testing-library/react": "^10.0.4",
+    "@testing-library/react": "^11.0.4",
     "@typescript-eslint/eslint-plugin": "^2.24.0",
     "@typescript-eslint/parser": "^2.24.0",
     "@testing-library/user-event": "^12.0.11",