message: Added recent fixes issues
diff: [Full Changelog](https://github.com/gitbrent/pptxgenjs/compare/v1.4.0...v1.5.0)
  **Fixed Bugs:**
  +- Can't override margin with 0 [\#78](https://github.com/gitbrent/PptxGenJS/issues/78) ([scottmtraver](https://github.com/scottmtraver))
  +
  **Implemented Enhancements:**
  +- Add ability to create charts [\#51](https://github.com/gitbrent/PptxGenJS/issues/51) ([alagarrk](https://github.com/alagarrk))
  