message: Added support to style iosIcon of picker.
  Fix for issue (How can I style picker's iosIcon)
diff: @@ -86,11 +86,11 @@ class PickerNB extends Component {
  renderIcon() {
  return React.cloneElement(this.props.iosIcon, {
  - style: {
  + style: [{
  fontSize: 22,
  lineHeight: 26,
  color: this.props.placeholderIconColor
  - }
  + }, { ...this.props.iosIcon.props.style }]
  });
  }
  