chore(deps): update dependency vitest to v4

Author: renovate[bot]

package.json

@@ -66,7 +66,7 @@
     "tsx": "4.20.5",
     "turbo": "2.3.3",
     "typescript": "5.9.2",
-    "vitest": "2.1.9",
+    "vitest": "4.0.18",
     "wrangler": "4.1.0"
   },
   "browserslist": [