message: Wrap Heading in withSx
diff: +import withSx from './hoc/withSx'
  import styled from 'styled-components'
  import PropTypes from 'prop-types'
  import {TYPOGRAPHY, COMMON, get} from './constants'
  import theme from './theme'
  -const Heading = styled.h1`
  +const Heading = withSx(styled.h1`
  font-weight: ${get('fontWeights.bold')};
  font-size: ${get('fontSizes.5')};
  margin: 0;
  ${TYPOGRAPHY} ${COMMON};
  -`
  +`)
  Heading.defaultProps = {
  theme
  