Update to Minecraft 1.15

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

paper-server/nms-patches/EntityLeash.patch

@@ -8,15 +8,15 @@
  import java.util.Iterator;
  import java.util.List;
  import javax.annotation.Nullable;
-@@ -31,6 +33,7 @@
-         this.locX = (double) this.blockPosition.getX() + 0.5D;
-         this.locY = (double) this.blockPosition.getY() + 0.5D;
-         this.locZ = (double) this.blockPosition.getZ() + 0.5D;
+@@ -29,6 +31,7 @@
+     @Override
+     protected void updateBoundingBox() {
+         this.setPositionRaw((double) this.blockPosition.getX() + 0.5D, (double) this.blockPosition.getY() + 0.5D, (double) this.blockPosition.getZ() + 0.5D);
 +        if (valid) ((WorldServer) world).chunkCheck(this); // CraftBukkit
      }
  
      @Override
-@@ -77,22 +80,42 @@
+@@ -75,22 +78,42 @@
              while (iterator.hasNext()) {
                  entityinsentient = (EntityInsentient) iterator.next();
                  if (entityinsentient.getLeashHolder() == entityhuman) {