message: update button prop types
diff: @@ -16,7 +16,8 @@ const Button = props => (
  Button.propTypes = {
  disabled: PropTypes.bool,
  - onClick: PropTypes.func.isRequired
  + onClick: PropTypes.func.isRequired,
  + style:PropTypes.string
  }
  export default Button
  \ No newline at end of file
  