chore(deps): update dependency eslint to v8

Author: renovate[bot]

package.json

@@ -31,7 +31,7 @@
     "@vue/cli-plugin-eslint": "~4.5.17",
     "@vue/cli-service": "~4.5.17",
     "babel-eslint": "^10.1.0",
-    "eslint": "^6.7.2",
+    "eslint": "8.19.0",
     "eslint-plugin-vue": "^6.2.2",
     "vue-template-compiler": "^2.6.11",
     "vuepress": "^1.9.7",