chore: update TypeScript to v6

Author: sethamus

package.json

@@ -41,7 +41,7 @@
     "mocha": "^11.1.0",
     "prettier": "3.8.1",
     "rollup": "^4.55.2",
-    "typescript": "^5.9.3",
+    "typescript": "^6.0.2",
     "yorkie": "^2.0.0"
   }
 }