chore(deps): update dependency vitest to v4

Author: renovate[bot]

package.json

@@ -63,7 +63,7 @@
     "rimraf": "^6.0.1",
     "typescript": "^5.8.3",
     "unbuild": "^3.5.0",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.0"
   },
   "peerDependencies": {
     "eslint": "^9.0.0",