1.0 - 2015/06/23 @levigroker - Initial release
1.1 - 2015/07/12 @levigroker - Nullability. Separation of UITableView util.
2.0 - 2016/04/28 @kesslermichael - Updated modifiedBlock to receive 2 arguments - previous object and current object
2.1 - 2016/05/02 @vlcone - Add tvOS deployment target
@kesslermichael - Added a category for updating UICollectionView from the GRKArrayDiff
2.2 - 2018/04/24 @gyratorycircus - Allowing GRKArrayDiff to gracefully handle inconsistent model arrays which contain duplicate identities.
2.2.1 - 2018/04/24 @levigroker Addressing type issues. 2.2.2 - 2020/10/27 @levigroker - Minimum deployment version bump to silence Xcode 12 warnings.