message: make selector more specific
diff: @@ -5,7 +5,7 @@ import {COMMON} from './constants'
  const transformChildren = children => {
  return React.Children.map(children, child => {
  - return React.cloneElement(child, {mr: 1})
  + return React.cloneElement(child, {mr: 1, className: 'LabelItem'})
  })
  }
  @@ -13,7 +13,7 @@ const LabelGroup = styled.span.attrs(props => ({
  children: transformChildren(props.children)
  }))`
  ${COMMON}
  - & span:last-child {
  + & .LabelItem:last-child {
  margin-right: 0;
  }
  `
  