message: add display to common props
diff: @@ -11,6 +11,7 @@ export const get = key => themeGet(key, getKey(theme, key))
  export const COMMON = compose(
  styledSystem.space,
  styledSystem.color,
  + styledSystem.display
  )
  COMMON.propTypes = {
  ...systemPropTypes.space,
  