Aspect Ratio Sizing

Miwi supports aspect ratio based sizing like

/* Whatever this width of this box ends up
 * being, the height will 2 / 3 of that. */
<Box widthGrows heightFromAspectRatio={3 / 2} fill={`red`} />

Note: Yeah the aspect ratio number is sometimes backwards right now. In future we'll change the aspect ratio to use the more intuitive fraction.