message: update link prop types
diff: @@ -43,7 +43,7 @@ styledLink.defaultProps = {
  styledLink.propTypes = {
  href: PropTypes.string,
  underline: PropTypes.bool,
  - is: PropTypes.oneOf(['a', 'button'])
  + is: PropTypes.oneOf(['a', 'button', 'input', 'summary'])
  }
  export default withSystemProps(
  