build(deps-dev): bump typescript from 5.9.3 to 6.0.2

Bumps [typescript](https://github.com/microsoft/TypeScript) from 5.9.3 to 6.0.2.
- [Release notes](https://github.com/microsoft/TypeScript/releases)
- [Commits](microsoft/TypeScript@v5.9.3...v6.0.2)

---
updated-dependencies:
- dependency-name: typescript
  dependency-version: 6.0.2
  dependency-type: direct:development
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package.json

@@ -31,7 +31,7 @@
     "eslint-config-etherpad": "^4.0.4",
     "socket.io-client": "^4.8.3",
     "superagent": "^8.1.2",
-    "typescript": "^5.9.3"
+    "typescript": "^6.0.2"
   },
   "scripts": {
     "lint": "eslint .",