Bump tslib from 2.6.1 to 2.6.2 in /frontend (#179)

Bumps [tslib](https://github.com/Microsoft/tslib) from 2.6.1 to 2.6.2.
- [Release notes](https://github.com/Microsoft/tslib/releases)
- [Commits](https://github.com/Microsoft/tslib/compare/v2.6.1...v2.6.2)

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

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

frontend/package.json

@@ -24,7 +24,7 @@
     "@ngbracket/ngx-layout": "^16.1.3",
     "mat-table-filter": "^15.0.0",
     "rxjs": "~7.8.1",
-    "tslib": "^2.3.0",
+    "tslib": "^2.6.2",
     "zone.js": "~0.13.0"
   },
   "devDependencies": {