Bump yargs from 12.0.1 to 13.2.4 in /app

Bumps [yargs](https://github.com/yargs/yargs) from 12.0.1 to 13.2.4.
- [Release notes](https://github.com/yargs/yargs/releases)
- [Changelog](https://github.com/yargs/yargs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/yargs/yargs/compare/v12.0.1...v13.2.4)

app/package.json

@@ -31,7 +31,7 @@
     "ngx-toastr": "^9.1.1",
     "path": "0.12.7",
     "rxjs": "^6.3.3",
-    "yargs": "^12.0.1",
+    "yargs": "^13.2.4",
     "zone.js": "^0.8.29"
   },
   "optionalDependencies": {