chore(package): update @vue/eslint-config-prettier to version 6.0.0

Author: greenkeeper[bot]

package.json

@@ -134,7 +134,7 @@
     "@types/mocha": "^5.2.6",
     "@typescript-eslint/eslint-plugin": "^2.5.0",
     "@typescript-eslint/parser": "^2.5.0",
-    "@vue/eslint-config-prettier": "^5.0.0",
+    "@vue/eslint-config-prettier": "^6.0.0",
     "@vue/eslint-config-typescript": "^5.0.0",
     "@vue/test-utils": "^1.0.0-beta.29",
     "axios": "^0.19.0",