message: Add JSDoc comments for histogram options
diff: @@ -149,7 +149,17 @@ export interface AreaStyleOptions {
  }
  export interface HistogramStyleOptions {
  + /**
  + * Column color.
  + *
  + * @default '#26a69a'
  + */
  color: string;
  + /**
  + * Initial level of histogram columns.
  + *
  + * @default 0
  + */
  base: number;
  }
  