BREAKING CHANGES
transform.unwrapBlock()now unwraps selectively. Previously, callingunwrapBlockwith a range representing a middle sibling would unwrap all of the siblings, removing the wrapping block entirely. Now, calling it with those same arguments will only move the middle sibling up a layer in the hierarchy, preserving the nesting on any of its siblings. This changes makes it much simpler to implement functionality like unwrapping a single list item, which previously would unwrap the entire list.