Update vitest

Author: AndyBitz

package.json

@@ -51,7 +51,7 @@
     "@types/compression": "1.7.2",
     "@types/serve-handler": "6.1.1",
     "@vercel/style-guide": "3.0.0",
-    "c8": "7.12.0",
+    "@vitest/coverage-v8": "2.1.3",
     "eslint": "8.19.0",
     "got": "12.1.0",
     "husky": "8.0.1",
@@ -60,7 +60,7 @@
     "tsup": "8.3.0",
     "tsx": "4.19.1",
     "typescript": "5.6.3",
-    "vitest": "0.18.0"
+    "vitest": "2.1.3"
   },
   "tsup": {
     "target": "esnext",