Bump ngx-toastr from 12.1.0 to 13.2.0 in /app

Bumps [ngx-toastr](https://github.com/scttcper/ngx-toastr) from 12.1.0 to 13.2.0.
- [Release notes](https://github.com/scttcper/ngx-toastr/releases)
- [Commits](https://github.com/scttcper/ngx-toastr/compare/v12.1.0...v13.2.0)

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

app/package.json

@@ -33,7 +33,7 @@
     "keytar": "^7.4.0",
     "mz": "^2.7.0",
     "native-process-working-directory": "^1.0.2",
-    "ngx-toastr": "^12.0.1",
+    "ngx-toastr": "^13.2.0",
     "npm": "6",
     "path": "0.12.7",
     "rxjs": "^6.6.6",