Update from upstream SpigotMC

Fix timings SpigotMC/Spigot@7d79f6bf5e
Fix the particle api using the wrong Material class SpigotMC/Spigot@f5a1e7a96f

CraftBukkit-Patches/0013-Spigot-Timings.patch

@@ -274,6 +274,13 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
  
          this.methodProfiler.a("tallying");
 @@ -0,0 +0,0 @@ public abstract class MinecraftServer implements ICommandListener, Runnable, IMo
+ 
+         this.methodProfiler.b();
+         this.methodProfiler.b();
++        SpigotTimings.serverTickTimer.stopTiming(); // Spigot
++        org.spigotmc.CustomTimingsHandler.tick(); // Spigot
+     }
+ 
      public void v() {
          this.methodProfiler.a("levels");
  
@@ -355,11 +362,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
 +        SpigotTimings.tickablesTimer.stopTiming(); // Spigot
  
          this.methodProfiler.b();
-+        SpigotTimings.serverTickTimer.stopTiming(); // Spigot
-+        org.spigotmc.CustomTimingsHandler.tick(); // Spigot
      }
- 
-     public boolean getAllowNether() {
 diff --git a/src/main/java/net/minecraft/server/PlayerConnection.java b/src/main/java/net/minecraft/server/PlayerConnection.java
 index 0000000000000000000000000000000000000000..0000000000000000000000000000000000000000 100644
 --- a/src/main/java/net/minecraft/server/PlayerConnection.java