message: give AvatarStack COMMON props
diff: import React from 'react'
  import styled from 'styled-components'
  -import {get} from './constants'
  +import {get, COMMON} from './constants'
  import uuid from 'uuid'
  const AvatarChild = styled.img`
  @@ -55,6 +55,7 @@ const AvatarStackWrapper = styled.span`
  position: relative;
  min-width: ${props => (props.count === 1 ? '26px' : props.count === 2 ? '36px' : '46px')};
  height: 20px;
  + ${COMMON}
  `
  const AvatarStackBody = styled.span`
  @@ -105,7 +106,7 @@ const AvatarStackBody = styled.span`
  `
  const AvatarStack = ({children, ...rest}) => {
  return (
  - <AvatarStackWrapper count={children.length}>
  + <AvatarStackWrapper count={children.length} {...rest}>
  <AvatarStackBody>{transformChildren(children)}</AvatarStackBody>
  </AvatarStackWrapper>
  )
  