chore(deps): update devdependency @antfu/eslint-config to v6

Author: renovate[bot]

package.json

@@ -59,7 +59,7 @@
     "unplugin": "^2.0.0"
   },
   "devDependencies": {
-    "@antfu/eslint-config": "5.4.1",
+    "@antfu/eslint-config": "6.0.0",
     "@codspeed/vitest-plugin": "5.0.1",
     "@nuxt/kit": "4.1.2",
     "@types/estree": "1.0.8",