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/Optimize-CraftBlockData-Creation.patch

@@ -34,7 +34,7 @@ index 4dd6c32761..1b226a77e0 100644
 +    // Paper end
  }
 diff --git a/src/main/java/net/minecraft/server/IBlockData.java b/src/main/java/net/minecraft/server/IBlockData.java
-index b57f6efb3a..7b1d750f3a 100644
+index 6f80876990..726b178fd8 100644
 --- a/src/main/java/net/minecraft/server/IBlockData.java
 +++ b/src/main/java/net/minecraft/server/IBlockData.java
 @@ -0,0 +0,0 @@ public interface IBlockData extends IBlockDataHolder<IBlockData> {
@@ -47,7 +47,7 @@ index b57f6efb3a..7b1d750f3a 100644
          return this.getBlock().n(this);
      }
 diff --git a/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java b/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
-index a4f3dd1b03..baaace6937 100644
+index d470e2b34a..b9279d925c 100644
 --- a/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
 +++ b/src/main/java/org/bukkit/craftbukkit/block/data/CraftBlockData.java
 @@ -0,0 +0,0 @@ public class CraftBlockData implements BlockData {