Updated Upstream (Bukkit/CraftBukkit)

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:
c71bb9ca Add PlayerRecipeDiscoverEvent and methods to (un/)discover recipes

CraftBukkit Changes:
7a2f4867 Implement PlayerRecipeDiscoverEvent and methods to (un/)discover recipes

Spigot-API-Patches/Shoulder-Entities-Release-API.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Shoulder Entities Release API
 
 
 diff --git a/src/main/java/org/bukkit/entity/HumanEntity.java b/src/main/java/org/bukkit/entity/HumanEntity.java
-index 518aa2a9..3939d4af 100644
+index 144e432cd..d137d6bf2 100644
 --- a/src/main/java/org/bukkit/entity/HumanEntity.java
 +++ b/src/main/java/org/bukkit/entity/HumanEntity.java
 @@ -0,0 +0,0 @@ public interface HumanEntity extends LivingEntity, AnimalTamer, Permissible, Inv
@@ -31,6 +31,6 @@ index 518aa2a9..3939d4af 100644
 +    // Paper end
 +
      /**
-      * Gets the entity currently perched on the left shoulder or null if no
-      * entity.
+      * Discover a recipe for this player such that it has not already been
+      * discovered. This method will add the key's associated recipe to the
 --