Api feature request

[feivur]

Please, add graggable item position parameter to callback canDragOver in class ReorderableState.
It is necessary for flexible work.

abstract class ReorderableState<T>(
    private val scope: CoroutineScope,
    private val maxScrollPerFrame: Float,
    private val onMove: (fromIndex: ItemPosition, toIndex: ItemPosition) -> (Unit),

    // here
    private val canDragOver: ((indexFrom: ItemPosition, indexTo: ItemPosition) -> Boolean)?,

    private val onDragEnd: ((startIndex: Int, endIndex: Int) -> (Unit))?,
    val dragCancelledAnimation: DragCancelledAnimation
) 

[VeselyJan92]

I have made a pull request for this. Feel free to leave code review. #184