chore(deps): update dependency vitest to v4

Author: renovate[bot]

package.json

@@ -18,7 +18,7 @@
     "@changesets/cli": "2.29.2",
     "bunchee": "6.5.0",
     "typescript": "5.8.3",
-    "vitest": "3.1.2"
+    "vitest": "4.0.8"
   },
   "engines": {
     "node": ">=22.11",