message: Added 2 new items
diff: - Vertical align and line break bug since update [\#79](https://github.com/gitbrent/PptxGenJS/issues/79) ([mirkoint](https://github.com/mirkoint))
  - Save callback is not called by client-browser when there are images to encode [\#187](https://github.com/gitbrent/PptxGenJS/issues/187) ([Malangs](https://github.com/Malangs))
  - Promise Dependency - TypeError: Promise.all is not a function [\#188](https://github.com/gitbrent/PptxGenJS/issues/188) ([bartolomeu](https://github.com/bartolomeu))
  +- Default text size in empty cells making row height too big [\#193](https://github.com/gitbrent/PptxGenJS/issues/193) ([mreilaender](https://github.com/mreilaender))
  +- Fixed issue that included many extraneous tab characters in the table demo lorem-ipsum text (GitBrent)
  **Implemented Enhancements:**
  - New chart feature: category axis dates [\#149](https://github.com/gitbrent/PptxGenJS/pull/149) ([kyrrigle](https://github.com/kyrrigle))
  