Update dependency eslint to v9

package.json

@@ -35,6 +35,6 @@
   "repository": "next-theme/hexo-generator-searchdb",
   "devDependencies": {
     "@next-theme/eslint-config": "0.0.3",
-    "eslint": "7.32.0"
+    "eslint": "9.7.0"
   }
 }