Update package.json

package.json

@@ -45,7 +45,7 @@
   "unpkg": "lib/index.js",
   "style": "lib/theme-default/index.css",
   "dependencies": {
-    "async-validator": "1.6.9",
+    "async-validator": "~1.8.1",
     "babel-helper-vue-jsx-merge-props": "^2.0.0",
     "deepmerge": "^1.2.0",
     "throttle-debounce": "^1.0.1"