[bugfix] fix vetur auto-complete config file (#3617)

package.json

@@ -73,6 +73,7 @@
     "@vant/doc": "^2.3.2",
     "@vant/eslint-config": "^1.1.2",
     "@vant/markdown-loader": "^2.0.0",
+    "@vant/markdown-vetur": "^1.0.0",
     "@vant/touch-emulator": "^1.0.0",
     "@vue/babel-preset-jsx": "^1.0.0",
     "@vue/server-test-utils": "^1.0.0-beta.29",
@@ -95,7 +96,6 @@
     "less": "^3.8.1",
     "less-loader": "^5.0.0",
     "lint-staged": "^8.2.1",
-    "markdown-vetur": "0.0.5",
     "postcss": "^7.0.17",
     "postcss-loader": "^3.0.0",
     "progress-bar-webpack-plugin": "^1.12.1",