Bump moment from 2.18.1 to 2.29.4

Bumps [moment](https://github.com/moment/moment) from 2.18.1 to 2.29.4.
- [Release notes](https://github.com/moment/moment/releases)
- [Changelog](https://github.com/moment/moment/blob/develop/CHANGELOG.md)
- [Commits](https://github.com/moment/moment/compare/2.18.1...2.29.4)

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

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

package.json

@@ -47,7 +47,7 @@
   },
   "dependencies": {
     "core-js": "^2.5.7",
-    "moment": "2.18.1",
+    "moment": "2.29.4",
     "office-ui-fabric-react": "^6.101.0",
     "react": "^16.6.1",
     "react-dom": "^16.6.1",