message: add ref type for superchart
diff: -import React, { ReactNode } from 'react';
  +import React, { ReactNode, RefObject } from 'react';
  import ErrorBoundary, { ErrorBoundaryProps, FallbackProps } from 'react-error-boundary';
  import { ParentSize } from '@vx/responsive';
  import { createSelector } from 'reselect';
  @@ -39,6 +39,8 @@ export type Props = Omit<SuperChartCoreProps, 'chartProps'> &
  onErrorBoundary?: ErrorBoundaryProps['onError'];
  /** Prop for form plugins uisng superchart */
  showOverflow?: boolean;
  + /** Prop for popovercontainer ref */
  + parentRef?: RefObject<any>;
  /** Chart width */
  height?: number | string;
  /** Chart height */
  