chore(deps): bump libphonenumber-js from 1.11.18 to 1.11.19 in /frontend

Bumps [libphonenumber-js](https://gitlab.com/catamphetamine/libphonenumber-js) from 1.11.18 to 1.11.19.
- [Changelog](https://gitlab.com/catamphetamine/libphonenumber-js/blob/master/CHANGELOG.md)
- [Commits](https://gitlab.com/catamphetamine/libphonenumber-js/compare/v1.11.18...v1.11.19)

---
updated-dependencies:
- dependency-name: libphonenumber-js
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

frontend/package.json

@@ -28,7 +28,7 @@
     "dompurify": "^3.2.4",
     "graphql-request": "^7.1.2",
     "i18next": "^24.2.2",
-    "libphonenumber-js": "^1.11.18",
+    "libphonenumber-js": "^1.11.19",
     "markdown-it": "^14.1.0",
     "react": "^16.14.0",
     "react-dom": "^16.14.0",