message: update FlexItem syntax
diff: @@ -3,8 +3,8 @@ import PropTypes from 'prop-types'
  import classnames from 'classnames'
  import {mapWhitespaceProps} from './props'
  -const FlexItem = (props) => {
  - const {tag: Tag = 'div', children, flexAuto, alignSelf, className} = mapWhitespaceProps(props)
  +const FlexItem = ({tag: Tag = 'div', children, flexAuto, alignSelf, ...rest}) => {
  + const {className} = mapWhitespaceProps(rest)
  const classes = classnames(className, {'flex-auto': flexAuto}, alignSelf && `flex-self-${alignSelf}`)
  return <Tag className={classes}>{children}</Tag>
  }
  