Upstream has released updates that appears to apply and compile correctly.
This update has not been tested by PaperMC and as with ANY update, please do your own testing
Bukkit Changes:
f1e73b03 #525: Add contributors plugin.yml field.
ef0999fe #529: Added getRecipe() method to retrieve a Recipe by it's NamespacedKey
CraftBukkit Changes:
8b831a965 #714: Added getRecipe() method to retrieve a Recipe by it's NamespacedKey