message: Added placeholderStyle to Picker.
  Associated with Issue
diff: @@ -105,7 +105,7 @@ class PickerNB extends Component {
  ? <Text style={this.props.textStyle} note={this.props.note}>
  {this.state.currentLabel}
  </Text>
  - : <Text style={this.props.textStyle} note={this.props.note === false ? false : true}>
  + : <Text style={[this.props.textStyle,this.props.placeholderStyle]} note={this.props.note === false ? false : true}>
  {this.props.placeholder}
  </Text>}
  {this.props.iosIcon === undefined ? null : this.renderIcon()}
  