Bump js-yaml from 4.0.0 to 4.1.0 in /app

Bumps [js-yaml](https://github.com/nodeca/js-yaml) from 4.0.0 to 4.1.0.
- [Release notes](https://github.com/nodeca/js-yaml/releases)
- [Changelog](https://github.com/nodeca/js-yaml/blob/master/CHANGELOG.md)
- [Commits](https://github.com/nodeca/js-yaml/compare/4.0.0...4.1.0)

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

app/package.json

@@ -29,7 +29,7 @@
     "electron-promise-ipc": "^2.2.4",
     "fontmanager-redux": "1.0.0",
     "glasstron": "0.0.7",
-    "js-yaml": "4.0.0",
+    "js-yaml": "4.1.0",
     "keytar": "^7.6.0",
     "mz": "^2.7.0",
     "native-process-working-directory": "^1.0.2",