Bump moment from 2.27.0 to 2.29.4 in /frontend

Bumps [moment](https://github.com/moment/moment) from 2.27.0 to 2.29.4.
- [Release notes](https://github.com/moment/moment/releases)
- [Changelog](https://github.com/moment/moment/blob/develop/CHANGELOG.md)
- [Commits](moment/moment@2.27.0...2.29.4)

---
updated-dependencies:
- dependency-name: moment
  dependency-type: direct:production
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -25,7 +25,7 @@
     "idx": "^2.5.6",
     "js-cookie": "^2.2.0",
     "lodash": "^4.17.19",
-    "moment": "^2.24.0",
+    "moment": "^2.29.4",
     "performant-array-to-tree": "1.7.1",
     "react": "^16.8.6",
     "react-apollo": "^2.5.8",