message: updated (c) year
diff: @@ -246,6 +246,6 @@ Thanks to everyone who supports this project! &#10084;
  **************************************************************************************************
  # License
  -Copyright &copy; 2015-2018 [Brent Ely](https://github.com/gitbrent/PptxGenJS)
  +Copyright &copy; 2015-2019 [Brent Ely](https://github.com/gitbrent/PptxGenJS)
  [MIT](https://github.com/gitbrent/PptxGenJS/blob/master/LICENSE)
  