message: Fix children at ChildrenProps
diff: +import * as React from 'react';
  export type Color = string;
  export interface BaseNodeProps {
  @@ -23,7 +24,7 @@ export interface LayoutProps {
  }
  export interface ChildrenProps {
  - children?: ReadonlyArray<BaseNode>;
  + children?: React.ReactNode;
  }
  export interface GeometryProps {
  