Update dependency vue-eslint-parser to v8 (#98)

Co-authored-by: Renovate Bot <bot@renovateapp.com>

Author: renovate[bot]

package.json

@@ -105,7 +105,7 @@
         "ts-node": "^10.0.0",
         "typescript": "^4.0.0",
         "vue-eslint-editor": "^1.1.0",
-        "vue-eslint-parser": "^7.3.0",
+        "vue-eslint-parser": "^8.0.0",
         "vuepress": "^1.5.2"
     }
 }