update readme

Author: KyLeoHC

README.md

@@ -126,6 +126,7 @@ Available `Prop` :
 :--- | :--- | :--- | :--- |
 | heights | Array | ✓ | A array contains all height of your item. |
 | remain | Number | * | The number of item that show in view port.(default `10`) |
+| enabled | Boolean | * | If you want to render all data directly,please set 'false' for this option.But `toTop`、`toBottom` and `scrolling` event is still available.(default `true`) |
 
 Available `Event` :