chore(deps): update dependency vitest to v4

Author: renovate[bot]

package.json

@@ -431,7 +431,7 @@
     "tempy": "^3.1.0",
     "tsup": "^8.4.0",
     "typescript": "^5.8.2",
-    "vitest": "^3.1.2",
+    "vitest": "^4.0.16",
     "ws": "^8.18.1"
   },
   "dependencies": {}