0.7.5

• fix bug: enableScrolling: false stops the wheel handler but the sheet still swallows
  the scroll. .sheet is a scroll container even at overflow: hidden, and the
  overscroll-behavior: contain guarding against swipe back keeps the gesture from ever
  reaching the page. it now relaxes to overscroll-behavior-y: auto while scrolling is
  off, via a no-scrolling class. the horizontal axis keeps contain, that being the
  axis swipe back lives on, and behaviour with scrolling enabled is unchanged.