Bump tslib from 2.3.1 to 2.4.0 in /frontend

Bumps [tslib](https://github.com/Microsoft/tslib) from 2.3.1 to 2.4.0.
- [Release notes](https://github.com/Microsoft/tslib/releases)
- [Commits](https://github.com/Microsoft/tslib/compare/2.3.1...2.4.0)

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

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

frontend/package.json

@@ -24,7 +24,7 @@
     "bootstrap": "^5.1.3",
     "ngx-cron-editor": "^0.7.3",
     "rxjs": "~7.5.0",
-    "tslib": "^2.3.0",
+    "tslib": "^2.4.0",
     "zone.js": "~0.11.4"
   },
   "devDependencies": {