[Improvement] Support Vue.use to register a component (#401)

packages/notice-bar/index.vue

@@ -26,15 +26,11 @@
 </template>
 
 <script>
-import Icon from '../icon';
+import { create } from '../utils';
 
-export default {
+export default create({
   name: 'van-notice-bar',
 
-  components: {
-    Icon
-  },
-
   props: {
     text: String,
     mode: String,
@@ -108,5 +104,5 @@ export default {
       });
     }
   }
-};
+});
 </script>