Add preview ref api for Node

Author: spellforce

packages/react-arborist/src/components/provider.tsx

@@ -57,7 +57,7 @@ export function TreeProvider<T>({
   useMemo(() => {
     updateCount.current += 1;
     api.update(treeProps);
-  }, [...Object.values(treeProps), state.nodes.open]);
+  }, [...Object.values(treeProps), state.nodes.open, state.dnd.parentId]);
 
   /* Expose the tree api */
   useImperativeHandle(imperativeHandle, () => api);