message: updated v3.0.0 release date
diff: @@ -9,7 +9,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
  - Sections
  -## [3.0.0] - 2019-12-31
  +## [3.0.0] - 2020-01-01
  ### Added
  - Ability to specify numbered list format [\#452](https://github.com/gitbrent/PptxGenJS/issue/452) ([mayvazyan](https://github.com/mayvazyan))
  - New cat/val axis options: majorTickMark/minorTickMark [\#473](https://github.com/gitbrent/PptxGenJS/pull/473) ([RokasDie](https://github.com/RokasDie))
  