Bump moment from 2.21.0 to 2.29.4

Bumps [moment](https://github.com/moment/moment) from 2.21.0 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/2.21.0...2.29.4)

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

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

package.json

@@ -6,7 +6,7 @@
   "dependencies": {
     "classnames": "^2.2.5",
     "linq": "^3.0.9",
-    "moment": "^2.21.0",
+    "moment": "^2.29.4",
     "moment-timezone": "^0.5.14",
     "react": "^16.2.0",
     "react-dom": "^16.2.1",