fixes typo

Author: leecade

README.md

@@ -198,7 +198,7 @@ AppRegistry.registerComponent('myproject', () => swiper);
 | paginationStyle | {...} | `style` | Custom styles will merge with the default styles. |
 | renderPagination | - | `function` | Complete control how to render pagination with three params (`index`, `total`, `context`) ref to `this.state.index` / `this.state.total` / `this`, For example: show numbers instead of dots. |
 | dot | `<View style={{backgroundColor:'rgba(0,0,0,.2)', width: 8, height: 8,borderRadius: 4, marginLeft: 3, marginRight: 3, marginTop: 3, marginBottom: 3,}} />` | `element` | Allow custom the dot element. |
-| activeDot | - | `element` | Allow custom the active-dot element. |
+| activeDot | `<View style={{backgroundColor: '#007aff', width: 8, height: 8, borderRadius: 4, marginLeft: 3, marginRight: 3, marginTop: 3, marginBottom: 3,}} />` | `element` | Allow custom the active-dot element. |
 | dotStyle | - | `object` | Allow custom the active-dot element. |
 | dotColor | - | `string` | Allow custom the active-dot element. |
 | activeDotColor | - | `string` | Allow custom the active-dot element. |