message: make toImplementSystemProps() ignore styled-system aliases
diff: @@ -7,6 +7,13 @@ expect.addSnapshotSerializer(createSerializer(emotion))
  const stringify = d => JSON.stringify(d, null, ' ')
  +const ALIAS_PROP_TYPES = [
  + 'w',
  + 'align',
  + 'justify',
  + 'wrap',
  +]
  +
  expect.extend({
  toHaveClass(node, klass) {
  const classes = getClasses(node)
  @@ -32,7 +39,9 @@ expect.extend({
  const fn = systemProps[name]
  return list.concat(Object.keys(fn.propTypes))
  }, [])
  - const missing = expectedPropKeys.filter(key => !propKeys.has(key))
  + const missing = expectedPropKeys
  + .filter(key => !propKeys.has(key))
  + .filter(key => !ALIAS_PROP_TYPES.includes(key))
  return {
  pass: missing.length === 0,
  message: () => `Missing prop${missing.length === 1 ? '' : 's'}: ${stringify(missing)}`
  