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/Include-Log4J2-SLF4J-implementation.patch

@@ -5,13 +5,13 @@ Subject: [PATCH] Include Log4J2 SLF4J implementation
 
 
 diff --git a/pom.xml b/pom.xml
-index bb32cb749d..a319cfe3b8 100644
+index cb42202add..3be49ee7f4 100644
 --- a/pom.xml
 +++ b/pom.xml
 @@ -0,0 +0,0 @@
+             <version>2.8.1</version>
+             <scope>compile</scope>
          </dependency>
- 
-         <!-- Paper - Add additional Log4J dependencies -->
 +        <dependency>
 +            <groupId>org.apache.logging.log4j</groupId>
 +            <artifactId>log4j-slf4j-impl</artifactId>