Bump rxjs from 7.1.0 to 7.2.0 in /app

Bumps [rxjs](https://github.com/reactivex/rxjs) from 7.1.0 to 7.2.0.
- [Release notes](https://github.com/reactivex/rxjs/releases)
- [Changelog](https://github.com/ReactiveX/rxjs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/reactivex/rxjs/compare/7.1.0...7.2.0)

---
updated-dependencies:
- dependency-name: rxjs
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

app/package.json

@@ -36,7 +36,7 @@
     "ngx-toastr": "^14.0.0",
     "node-pty": "^0.10.1",
     "npm": "6",
-    "rxjs": "^7.1.0",
+    "rxjs": "^7.2.0",
     "yargs": "^17.0.1",
     "zone.js": "^0.11.4"
   },