Update to Minecraft 1.13

By: md_5 <git@md-5.net>

paper-server/nms-patches/Entity.patch

@@ -500,9 +500,9 @@
 @@ -1799,6 +2118,13 @@
      }
  
-     public void g(boolean flag) {
+     public void setSwimming(boolean flag) {
 +        // CraftBukkit start
-+        if (this.bb() != flag && this instanceof EntityLiving) {
++        if (this.isSwimming() != flag && this instanceof EntityLiving) {
 +            if (CraftEventFactory.callToggleSwimEvent((EntityLiving) this, flag).isCancelled()) {
 +                return;
 +            }