Updated Upstream (Bukkit/CraftBukkit/Spigot)

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

Please note that this build includes changes to meet upstreams
requirements for nullability annotations. While we aim for a level of
accuracy, these might not be 100% correct, if there are any issues,
please speak to us on discord, or open an issue on the tracker to
discuss.

Bukkit Changes:
9a6a1de3 Remove nullability annotations from enum constructors
3f0591ea SPIGOT-2540: Add nullability annotations to entire Bukkit API

CraftBukkit Changes:
8d8475fc SPIGOT-4666: Force parameter in HumanEntity#sleep
8b1588e2 Fix ExplosionPrimeEvent#setFire not working with EnderCrystals
39a287b7 Don't ignore newlines in PlayerListHeader/Footer

Spigot Changes:
cf694d87 Add nullability annotations

Spigot-API-Patches/PotionEffect-clone-methods.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] PotionEffect clone methods
 
 
 diff --git a/src/main/java/org/bukkit/potion/PotionEffect.java b/src/main/java/org/bukkit/potion/PotionEffect.java
-index 86616f1b..efb55d29 100644
+index d57450c95..4125a024e 100644
 --- a/src/main/java/org/bukkit/potion/PotionEffect.java
 +++ b/src/main/java/org/bukkit/potion/PotionEffect.java
 @@ -0,0 +0,0 @@ public class PotionEffect implements ConfigurationSerializable {
@@ -13,27 +13,33 @@ index 86616f1b..efb55d29 100644
      }
  
 +    // Paper start
-+    public PotionEffect withType(PotionEffectType type) {
++    @NotNull
++    public PotionEffect withType(@NotNull PotionEffectType type) {
 +        return new PotionEffect(type, duration, amplifier, ambient, particles, icon);
 +    }
++    @NotNull
 +    public PotionEffect withDuration(int duration) {
 +        return new PotionEffect(this.type, duration, amplifier, ambient, particles, icon);
 +    }
++    @NotNull
 +    public PotionEffect withAmplifier(int amplifier) {
 +        return new PotionEffect(this.type, duration, amplifier, ambient, particles, icon);
 +    }
++    @NotNull
 +    public PotionEffect withAmbient(boolean ambient) {
 +        return new PotionEffect(this.type, duration, amplifier, ambient, particles, icon);
 +    }
++    @NotNull
 +    public PotionEffect withParticles(boolean particles) {
 +        return new PotionEffect(this.type, duration, amplifier, ambient, particles, icon);
 +    }
++    @NotNull
 +    public PotionEffect withIcon(boolean icon) {
 +        return new PotionEffect(this.type, duration, amplifier, ambient, particles, icon);
 +    }
 +    // Paper end
 +
-     private static PotionEffectType getEffectType(Map<?, ?> map) {
+     @NotNull
+     private static PotionEffectType getEffectType(@NotNull Map<?, ?> map) {
          int type = getInt(map, TYPE);
-         PotionEffectType effect = PotionEffectType.getById(type);
 --