chore(deps): update dependency vitest to v4 (#11)

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

Author: renovate[bot]

package.json

@@ -69,7 +69,7 @@
     "tsdown": "^0.11.9",
     "tsx": "^4.19.4",
     "typescript": "^5.8.3",
-    "vitest": "^3.1.3",
+    "vitest": "^4.0.3",
     "vue": "^3.5.16",
     "vue-router": "^4.5.1"
   },