message: add fontSize to system-props.TYPOGRAPHY, format nicely
diff: @@ -6,9 +6,16 @@ export {system as default}
  export const COMMON = ['color', 'space']
  -export const TYPOGRAPHY = COMMON.concat('fontFamily', 'fontWeight', 'lineHeight')
  +export const TYPOGRAPHY = COMMON.concat(
  + // typography props
  + 'fontFamily',
  + 'fontSize',
  + 'fontWeight',
  + 'lineHeight'
  +)
  export const LAYOUT = COMMON.concat(
  + // layout props
  'borders',
  'borderColor',
  'borderRadius',
  @@ -24,9 +31,18 @@ export const LAYOUT = COMMON.concat(
  'verticalAlign'
  )
  -export const POSITION = ['position', 'zIndex', 'top', 'right', 'bottom', 'left']
  +export const POSITION = [
  + // position props
  + 'position',
  + 'zIndex',
  + 'top',
  + 'right',
  + 'bottom',
  + 'left'
  +]
  export const FLEX_CONTAINER = LAYOUT.concat(
  + // flex container props (display: flex)
  'alignContent',
  'alignItems',
  'flexWrap',
  @@ -37,7 +53,11 @@ export const FLEX_CONTAINER = LAYOUT.concat(
  'order'
  )
  -export const FLEX_ITEM = LAYOUT.concat('justifySelf', 'alignSelf')
  +export const FLEX_ITEM = LAYOUT.concat(
  + // flex container child props
  + 'justifySelf',
  + 'alignSelf'
  +)
  /**
  * Defensively determine whether a component function or class is a "system
  