message: Added new fix
diff: - 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))
  +- Hyperlink and XML entities issue #90 [\#90](https://github.com/gitbrent/PptxGenJS/issues/90) ([ZouhaierSebri](https://github.com/ZouhaierSebri))
  - Tooltip option not implemented for image hyperlink [\#91](https://github.com/gitbrent/PptxGenJS/issues/91) ([ZouhaierSebri](https://github.com/ZouhaierSebri))
  **Implemented Enhancements:**
  