style:修改icon组件样式

Author: yaochuxia

example/examples/src/routes/Icon/index.tsx

@@ -296,6 +296,7 @@ export default class IconPage extends React.Component<IconPageProps> {
                 size={18}
                 style={styles.icon}
               />
+              <Icon name='apple' size={18} color='#50CB42' />
             </Card>
             <Card title="UIW Icon" extra={<LinkButtons />}>
               <View style={styles.list}>

packages/core/src/Icon/README.md

@@ -14,6 +14,7 @@ class Demo extends Component {
     return (
       <View>
         <Icon name='apple' size={46} color='#50CB42' />
+        <Icon name='apple' size={46} fill='red' />
       </View>
     )
   }