SPIGOT-6123: Call EntityDamageEvent when a shulker bullet gets damaged

nms-patches/EntityShulkerBullet.patch

@@ -31,3 +31,15 @@
              }
          }
  
+@@ -282,6 +295,11 @@
+ 
+     @Override
+     public boolean damageEntity(DamageSource damagesource, float f) {
++        // CraftBukkit start
++        if (org.bukkit.craftbukkit.event.CraftEventFactory.handleNonLivingEntityDamageEvent(this, damagesource, f, false)) {
++            return false;
++        }
++        // CraftBukkit end
+         if (!this.world.isClientSide) {
+             this.playSound(SoundEffects.ENTITY_SHULKER_BULLET_HURT, 1.0F, 1.0F);
+             ((WorldServer) this.world).a(Particles.CRIT, this.locX(), this.locY(), this.locZ(), 15, 0.2D, 0.2D, 0.2D, 0.0D);