4.7.0

• Added enforceBoundsDuringZoom: boolean prop to ensures that it's also not possible to move the image out of bounds with a pinch gesture. #72 (thanks Tim Fischbach)
• Added doubleTapZoomOutOnMaxScale: boolean & doubleTapToggleZoom?: boolean props to let the second of two consecutive double taps zoom out again. #70 (thanks Tim Fischbach)