chore(docs): Add update style doc (#225)

* add style doc in reference.md

* Update Reference.md

docs/Reference.md

 
 ---
 
+### `style`
+
+A style object that allow you to customize the `WebView` style. Please not that there are default styles (example: you need to add `flex: 0` to the style if you want to use `height` property).
+
+| Type  | Required |
+| ----- | -------- |
+| style | No       |
+
+---
+
 ### `decelerationRate`
 
 A floating-point number that determines how quickly the scroll view decelerates after the user lifts their finger. You may also use the string shortcuts `"normal"` and `"fast"` which match the underlying iOS settings for `UIScrollViewDecelerationRateNormal` and `UIScrollViewDecelerationRateFast` respectively: