Updated README.md

Added containerStyle prop in Properties section

README.md

@@ -189,6 +189,7 @@ AppRegistry.registerComponent('myproject', () => Swiper);
 | width | - | `number` | If no specify default enable fullscreen mode by `flex: 1`. |
 | height | - | `number` | If no specify default fullscreen mode by `flex: 1`. |
 | style | {...} | `style` | See default style in source. |
+| containerStyle | {...} | `style` | See default container style in source. |
 | loadMinimal | false | `bool` | Only load current index slide , `loadMinimalSize` slides before and after. |
 | loadMinimalSize | 1 | `number` | see `loadMinimal`   |
 | loadMinimalLoader | `<ActivityIndicator />` | `element` | Custom loader to display when slides aren't loaded