…topIndex' in 'onItemsRendered'. (Previously this value was incorrectly reported as one index higher.) - (@justingrant - https://github.com/bvaughn/react-window/pull/274)

* Fixed size list and grid components 'scrollToItem' "center" mode when the item being scrolled to is near the viewport edge. - (@justingrant - https://github.com/bvaughn/react-window/pull/274)