message: Allows styling of weight/style
diff: import styled, { css } from 'styled-components';
  -import { display, space, textColor, fontFamily, fontSize, lineHeight, textAlign, width } from 'styled-system';
  +import { display, space, textColor, fontFamily, fontWeight, fontStyle, fontSize, lineHeight, textAlign, width } from 'styled-system';
  import { preset } from 'react/styles/functions';
  import { antialiased, neutralMarginsY } from 'react/styles/mixins';
  @@ -10,6 +10,8 @@ export const mixin = css`
  ${space}
  ${preset(fontFamily, { font: 'sans' })}
  ${preset(fontSize, { f: 4 })}
  + ${fontWeight}
  + ${fontStyle}
  ${preset(lineHeight, { lineHeight: 1 })}
  ${preset(textColor, { color: 'gray.base' })}
  ${textAlign}
  