message: Add space parameters to avatar
diff: import styled from 'styled-components';
  +import { space } from 'styled-system';
  const Avatar = styled.a`
  display: flex;
  @@ -9,6 +10,7 @@ const Avatar = styled.a`
  width: ${x => x.size}px;
  height: ${x => x.size}px;
  background-color: ${x => x.theme.colors.gray.semiLight};
  + ${space}
  `;
  Avatar.defaultProps = {
  