message: upgrade fonts map and add lineHeights.normal to theme
diff: @@ -62,7 +62,8 @@ const theme = {
  large: '1012px',
  xlarge: '1280px'
  },
  - fonts: [
  + fonts: {
  + normal: fontStack([
  '-apple-system',
  'BlinkMacSystemFont',
  'Segoe UI',
  @@ -72,8 +73,19 @@ const theme = {
  'Apple Color Emoji',
  'Segoe UI Emoji',
  'Segoe UI Symbol'
  - ],
  - lineHeight: 1.5,
  + ]),
  + mono: fontStack([
  + 'SFMono-Regular',
  + 'Consolas',
  + 'Liberation Mono',
  + 'Menlo',
  + 'Courier',
  + 'monospace'
  + ])
  + },
  + lineHeights: {
  + normal: 1.5
  + },
  colors,
  borders: [
  0,
  @@ -92,3 +104,7 @@ const theme = {
  export default theme
  export {colors}
  +
  +function fontStack(fonts) {
  + return fonts.map(font => font.includes(' ') ? `"${font}"` : font).join(', ')
  +}
  