ggjoy 0.4.0
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- All code has been moved over to package ggridges. As of this version, ggjoy
  simply calls ggridges and re-exports relevant functions under the old name.

ggjoy 0.3.0.9000
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- Added an option to center axis labels to `theme_joy()`.

ggjoy 0.3.0
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- Added cyclical scales that make it easy to alternate between fill colors
  and other aesthetics.

ggjoy 0.2.0
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Numerous improvements:
- New stat `binline` that can be used to draw histogram joyplots.
- Various improvements in `stat_joy`. In particular, it now works properly
  with multiple panels. It also now has parameters `from` and `to` to limit the
  range of density estimation, just like `density()`.
- Improvements in the vignettes
- New geoms `geom_ridgeline_gradient` and `geom_joy_gradient` that can handle gradient fills.

ggjoy 0.1.0
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First complete implementation ready for initial release
