Paper 1.13.1 Update

Updated Upstream (Bukkit/CraftBukkit/Spigot)

Bukkit Changes:
2dcc44dc SPIGOT-4307: Fix hacky API for banners on shields
e0fc6572 SPIGOT-4309: Add "forced" display of particles
efeeab2f Add index to README.md for easier navigation
f502bc6f Update to Minecraft 1.13.1

CraftBukkit Changes:
d0bb0a1d Fix some tests randomly failing
997d378d Fix client stall in specific teleportation scenarios
b3dc2366 SPIGOT-4307: Fix hacky API for banners on shields
2a271162 SPIGOT-4301: Fix more invalid enchants
5d0d83bb SPIGOT-4309: Add "forced" display of particles
a6772578 Add additional tests for CraftBlockData
ce1af0c3 Update to Minecraft 1.13.1

Spigot Changes:
2440e189 Rebuild patches
4ecffced Update to Minecraft 1.13.1

Spigot-Server-Patches/Entity-Tracking-Improvements.patch

@@ -7,11 +7,11 @@ If any part of a Vehicle/Passenger relationship is visible to a player,
 send all passenger/vehicles to the player in the chain.
 
 diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
-index da1254f5e1..428eaca37a 100644
+index d070d68d7c..4d2e978894 100644
 --- a/src/main/java/net/minecraft/server/Entity.java
 +++ b/src/main/java/net/minecraft/server/Entity.java
 @@ -0,0 +0,0 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
- 
+     public com.destroystokyo.paper.loottable.PaperLootableInventoryData lootableData; // Paper
      protected CraftEntity bukkitEntity;
  
 +    EntityTrackerEntry tracker; // Paper
@@ -19,7 +19,7 @@ index da1254f5e1..428eaca37a 100644
          if (bukkitEntity == null) {
              bukkitEntity = CraftEntity.getEntity(world.getServer(), this);
 diff --git a/src/main/java/net/minecraft/server/EntityTrackerEntry.java b/src/main/java/net/minecraft/server/EntityTrackerEntry.java
-index a04a06f3bf..c405cc74ba 100644
+index cce2ce9397..4dbc5eca34 100644
 --- a/src/main/java/net/minecraft/server/EntityTrackerEntry.java
 +++ b/src/main/java/net/minecraft/server/EntityTrackerEntry.java
 @@ -0,0 +0,0 @@ public class EntityTrackerEntry {