message: Update box shadow to match Primer CSS Next
diff: @@ -192,10 +192,10 @@ const theme = {
  lineHeights,
  radii: ['0', '3px', '6px', '100px'],
  shadows: {
  - small: '0 1px 1px rgba(27, 31, 35, 0.1)',
  - medium: '0 1px 5px rgba(27, 31, 35, 0.15)',
  - large: '0 1px 15px rgba(27, 31, 35, 0.15)',
  - 'extra-large': '0 10px 50px rgba(27, 31, 35, 0.07)',
  + small: '0 1px 0 rgba(149, 157, 165, 0.1)',
  + medium: '0 3px 6px rgba(149, 157, 165, 0.15)',
  + large: '0 8px 24px rgba(149, 157, 165, 0.2)',
  + 'extra-large': '0 12px 48px rgba(149, 157, 165, 0.3)',
  formControl: 'inset 0px 2px 0px rgba(225, 228, 232, 0.2)',
  formControlDisabled: 'inset 0px 2px 0px rgba(220, 227, 237, 0.3)',
  formControlFocus: 'rgba(3, 102, 214, 0.3) 0px 0px 0px 0.2em',
  