message: add default fill for invalid states
diff: @@ -12,6 +12,8 @@ const fillForState = {
  'success': colors.green[5]
  }
  +const DEFAULT_FILL = colors.gray[5]
  +
  function mapData(data) {
  return Object.keys(data)
  .map((key, i) => (
  @@ -42,7 +44,7 @@ const DonutChart = props => {
  const arcs = React.Children.map(children, (child, i) => {
  const {
  state,
  - fill = fillForState[state]
  + fill = fillForState[state] || DEFAULT_FILL
  } = child.props
  return React.cloneElement(child, {
  d: arc(arcData[i]),
  