message: fix children prop type
diff: @@ -68,7 +68,7 @@ Block.propTypes = {
  border: PropTypes.oneOfType([PropTypes.bool, oneOrMoreOf(PropTypes.oneOf(['top', 'right', 'bottom', 'left']))]),
  borderColor: PropTypes.oneOf(borderColors),
  borderRadius: PropTypes.oneOf([0, 1, 2]),
  - children: PropTypes.element,
  + children: PropTypes.node,
  display: PropTypes.oneOf(['inline', 'inline-block']),
  fg: PropTypes.string,
  position: PropTypes.oneOf(['absolute', 'fixed', 'relative']),
  