chore(deps): update devdependency eslint to v9

Author: renovate[bot]

package.json

@@ -29,7 +29,7 @@
     "@nuxtjs/eslint-config": "^1.1.2",
     "babel-eslint": "^10.1.0",
     "codecov": "3.8.1",
-    "eslint": "^6.8.0",
+    "eslint": "^9.20.1",
     "eslint-config-standard": "^13.0.1",
     "eslint-loader": "^2.2.1",
     "eslint-plugin-import": "^2.22.1",