build(deps): bump react-ga from 2.7.0 to 3.3.1 in /frontend

Bumps [react-ga](https://github.com/react-ga/react-ga) from 2.7.0 to 3.3.1.
- [Release notes](https://github.com/react-ga/react-ga/releases)
- [Commits](react-ga/react-ga@v2.7.0...v3.3.1)

---
updated-dependencies:
- dependency-name: react-ga
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -12,7 +12,7 @@
     "react": "^16.14.0",
     "react-alice-carousel": "^2.5.1",
     "react-dom": "^16.14.0",
-    "react-ga": "^2.7.0",
+    "react-ga": "^3.3.1",
     "react-helmet": "^6.1.0",
     "react-router": "^5.2.0",
     "react-router-config": "^5.1.1",