Bump ngx-toastr from 10.2.0 to 12.0.0 in /app

Bumps [ngx-toastr](https://github.com/scttcper/ngx-toastr) from 10.2.0 to 12.0.0.
- [Release notes](https://github.com/scttcper/ngx-toastr/releases)
- [Commits](https://github.com/scttcper/ngx-toastr/compare/v10.2.0...v12.0.0)

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

app/package.json

@@ -30,7 +30,7 @@
     "js-yaml": "3.13.1",
     "keytar": "^5.4.0",
     "mz": "^2.7.0",
-    "ngx-toastr": "^10.2.0",
+    "ngx-toastr": "^12.0.0",
     "node-pty": "^0.10.0-beta2",
     "npm": "6.9.0",
     "path": "0.12.7",