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/Configurable-Grass-Spread-Tick-Rate.patch

@@ -5,7 +5,7 @@ Subject: [PATCH] Configurable Grass Spread Tick Rate
 
 
 diff --git a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
-index 613964ce04..bb1c1c57cc 100644
+index f62faf81e7..ee38eb8e05 100644
 --- a/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
 +++ b/src/main/java/com/destroystokyo/paper/PaperWorldConfig.java
 @@ -0,0 +0,0 @@ public class PaperWorldConfig {
@@ -20,7 +20,7 @@ index 613964ce04..bb1c1c57cc 100644
 +    }
  }
 diff --git a/src/main/java/net/minecraft/server/BlockDirtSnowSpreadable.java b/src/main/java/net/minecraft/server/BlockDirtSnowSpreadable.java
-index 6343fb1e0d..903e8241b8 100644
+index b0e08a3365..52ae980d37 100644
 --- a/src/main/java/net/minecraft/server/BlockDirtSnowSpreadable.java
 +++ b/src/main/java/net/minecraft/server/BlockDirtSnowSpreadable.java
 @@ -0,0 +0,0 @@ public abstract class BlockDirtSnowSpreadable extends BlockDirtSnow {