message: Adding recent fixes
diff: [Full Changelog](https://github.com/gitbrent/pptxgenjs/compare/v1.4.0...v1.5.0)
  **Fixed Bugs:**
  +- Hyperlink and font_face problem [\#74](https://github.com/gitbrent/PptxGenJS/issues/74) ([ZouhaierSebri](https://github.com/ZouhaierSebri))
  - Can't override margin with 0 [\#78](https://github.com/gitbrent/PptxGenJS/issues/78) ([scottmtraver](https://github.com/scottmtraver))
  - Issue with autopage and colspan [\#80](https://github.com/gitbrent/PptxGenJS/issues/80) ([Szymon-dziewonski](https://github.com/Szymon-dziewonski))
  -- Does not work on Firefox for Mac, no issues on Firefox for windows. [\#81](https://github.com/gitbrent/PptxGenJS/issues/81) ([alexanderdevm](https://github.com/alexanderdevm) and [rwhitmore90](https://github.com/rwhitmore90))
  +- Does not work on Firefox for Mac, no issues on Firefox for windows [\#81](https://github.com/gitbrent/PptxGenJS/issues/81) ([alexanderdevm](https://github.com/alexanderdevm) and [rwhitmore90](https://github.com/rwhitmore90))
  +- Not a real issue, just a quick README fix [\#88](https://github.com/gitbrent/PptxGenJS/issues/88) ([mirkoint](https://github.com/mirkoint))
  +- Invalid XML when calling .addText() with empty array [\#89](https://github.com/gitbrent/PptxGenJS/issues/89) ([JimmyTheChimp](https://github.com/JimmyTheChimp))
  **Implemented Enhancements:**
  - Add ability to create charts [\#51](https://github.com/gitbrent/PptxGenJS/issues/51) ([alagarrk](https://github.com/alagarrk))
  -- added image type to shapes to allow images to be placed on top of shapes, added more properties to ppt document [\#53](https://github.com/gitbrent/PptxGenJS/pull/53) ([ericwgreene](https://github.com/ericwgreene))
  +- Added image type to shapes to allow images to be placed on top of shapes, added more properties to ppt document [\#53](https://github.com/gitbrent/PptxGenJS/pull/53) ([ericwgreene](https://github.com/ericwgreene))
  - Shape line Diagonal [\#75](https://github.com/gitbrent/PptxGenJS/issues/75) ([vanekar](https://github.com/vanekar))
  - Add hyperlink to Image [\#77](https://github.com/gitbrent/PptxGenJS/issues/77) ([plopez7](https://github.com/plopez7))
  