message: updated IChartOpts _type
diff: @@ -595,7 +595,7 @@ declare namespace PptxGenJS {
  color?: string
  }
  export interface IChartOpts extends PositionOptions, OptsChartGridLine {
  - type: CHART_TYPE_NAMES | IChartMulti[]
  + _type?: CHART_TYPE_NAMES | IChartMulti[]
  axisPos?: string
  bar3DShape?: string
  barDir?: string
  