Bump moment from 2.28.0 to 2.29.4

Bumps [moment](https://github.com/moment/moment) from 2.28.0 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@2.28.0...2.29.4)

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

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

package.json

@@ -60,7 +60,7 @@
     "keytar": "4.13.0",
     "lodash.memoize": "4.1.2",
     "marked": "0.8.0",
-    "moment": "2.28.0",
+    "moment": "2.29.4",
     "node-emoji": "1.10.0",
     "prop-types": "15.7.2",
     "react": "16.12.0",