chore: upgrade vitest to v4 (#138)

Author: pi0

package.json

@@ -68,7 +68,7 @@
     "@types/node": "^24.9.0",
     "@types/node-forge": "^1.3.14",
     "@types/serviceworker": "^0.0.158",
-    "@vitest/coverage-v8": "^3.2.4",
+    "@vitest/coverage-v8": "^4.0.8",
     "@whatwg-node/server": "^0.10.13",
     "automd": "^0.4.2",
     "changelogen": "^0.6.2",
@@ -87,7 +87,7 @@
     "tslib": "^2.8.1",
     "typescript": "^5.9.3",
     "undici": "^7.16.0",
-    "vitest": "^3.2.4"
+    "vitest": "^4.0.8"
   },
   "packageManager": "[email protected]",
   "engines": {