Adds one of two classes to body to indicate whether touch input is currently in use
$ npm install @kmccullough/using-touch-layoutwindow.usingTouchLayout = new UsingTouchLayout({
classElement: undefined, // Defaults to `document.body`
eventElement: undefined, // Defaults to `document`
onTouchActive: () => {}, // Called when touch active
onNonTouchActive: () => {}, // Called when non-touch active
onChange: isTouchActive => {}, // Called when non-touch/touch become active
nonTouchActiveClass: undefined, // Defaults to `l-using-touch--non-touch`
touchActiveClass: undefined, // Defaults to `l-using-touch--touch`
});