message: add support for display="none"
diff: @@ -81,7 +81,7 @@ Block.propTypes = {
  borderColor: PropTypes.oneOf(borderColors),
  borderRadius: PropTypes.oneOf([0, 1, 2]),
  children: PropTypes.element,
  - display: PropTypes.oneOf(['inline', 'inline-block']),
  + display: PropTypes.oneOf(['inline', 'inline-block', 'none']),
  fg: PropTypes.string,
  position: PropTypes.oneOf(['absolute', 'fixed', 'relative']),
  shadow: PropTypes.oneOf([true, 'medium', 'large', 'extra-large']),
  