Bump typescript from 5.4.5 to 5.7.3

Bumps [typescript](https://github.com/microsoft/TypeScript) from 5.4.5 to 5.7.3.
- [Release notes](https://github.com/microsoft/TypeScript/releases)
- [Changelog](https://github.com/microsoft/TypeScript/blob/main/azure-pipelines.release.yml)
- [Commits](microsoft/TypeScript@v5.4.5...v5.7.3)

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

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

package.json

@@ -25,7 +25,7 @@
     "eslint": "^8.57.0",
     "eslint-config-etherpad": "^4.0.4",
     "mocha": "^10.2.0",
-    "typescript": "^5.4.5"
+    "typescript": "^5.7.3"
   },
   "scripts": {
     "lint": "eslint .",