chore(deps): update dependency vitest to v4 (#152)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -77,7 +77,7 @@
     "prettier": "^3.6.2",
     "tsdown": "^0.15.10",
     "typescript": "^5.9.3",
-    "vitest": "^3.2.4",
+    "vitest": "^4.0.3",
     "vuepress": "^2.0.0-rc.26"
   },
   "nano-staged": {