message: added `slideNumber`
diff: @@ -56,7 +56,9 @@ function basicDemoSlide(pptx: pptxgen) {
  //pptx.addSlide(); // slide1
  //pptx.addSlide({ sectionTitle: "TypeScript" }); // slide2
  - let slide3 = pptx.addSlide({ sectionTitle: "TypeScript", masterName: "MASTER_SLIDE" });
  + let slide = pptx.addSlide({ sectionTitle: "TypeScript", masterName: "MASTER_SLIDE" });
  + slide.slideNumber = { x: '50%', y: '95%', w: 1, h: 1, color: '0088CC' };
  +
  let opts: pptxgen.TextPropsOptions = {
  x: 0,
  y: 1,
  @@ -66,7 +68,7 @@ function basicDemoSlide(pptx: pptxgen) {
  align: "center",
  fontSize: 36,
  };
  - slide3.addText("React Demo!", opts);
  + slide.addText("React Demo!", opts);
  }
  function testMethod_Chart(pptx: pptxgen) {
  