RSKImageCropper Versions Save

• Restored the previous behavior of [RSKImageScrollView zoomToRect:animated:]

Main changes:

• Add sendability annotations and missing nullability annotations
• Avoid floats for maskRect as we do for movementRect
• Synchronize the animation of the maskPath with the animation of other UI elements
• Fix zooming to the specified area of the image
• Fix initial zoom scale of RSKImageScrollView
• Make all methods of RSKImageScrollViewDelegate optional
• Add [imageScrollViewDidScroll] method to RSKImageScrollViewDelegate
• Add image, imageBackgroundColor, imageFrame, and imageSize properties and [setInitialZoomScaleAndContentOffsetAnimated:], [zoomToLocation:animated:], and [zoomToRect:animated:] methods to RSKImageScrollView
• Deprecate zoomView property and [displayImage:] method of RSKImageScrollView
• Add documentation for RSKImageScrollView and RSKImageScrollViewDelegate

• Added bounces and bouncesZoom to RSKImageCropViewController (#241)
• Updated spacing for moveAndScaleLabel, cancelButton, and chooseButton (#178, #238)
• Now user events for cancelButton and chooseButton are ignored while the image is being dragged, decelerated, or zoomed (#234, #242)
• Bumped deployment target (12.0)

Fixes #212.

Fixes #210.