chore(deps): update dependency vitest to v4

Author: renovate[bot]

package.json

@@ -35,7 +35,7 @@
     "prettier": "3.6.2",
     "source-map-loader": "^5.0.0",
     "typescript": "5.9.2",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.0"
   },
   "engines": {
     "node": ">=18"