build(deps-dev): bump @testing-library/user-event in /frontend (#210)

Bumps [@testing-library/user-event](https://github.com/testing-library/user-event) from 12.8.1 to 12.8.3.
- [Release notes](https://github.com/testing-library/user-event/releases)
- [Changelog](https://github.com/testing-library/user-event/blob/master/CHANGELOG.md)
- [Commits](testing-library/user-event@v12.8.1...v12.8.3)

Signed-off-by: dependabot[bot] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: kodiakhq[bot] <49736102+kodiakhq[bot]@users.noreply.github.com>

Author: dependabot[bot]

frontend/package-lock.json

@@ -26,7 +26,7 @@
     "@testing-library/jest-dom": "^5.11.9",
     "@testing-library/react": "^11.2.5",
     "@testing-library/react-hooks": "^5.1.0",
-    "@testing-library/user-event": "^12.8.1",
+    "@testing-library/user-event": "^12.8.3",
     "@types/node-fetch": "^2.5.8",
     "jest-webgl-canvas-mock": "^0.2.3",
     "jsdom-worker": "^0.2.1",