just to change from disabling spawn chunks to control over its size. Removes disableSpawnChunks, adds spawnChunksSize. Fixes #192

src/main/java/carpet/utils/SpawnChunks.java

@@ -0,0 +1,16 @@
+package carpet.utils;
+
+import carpet.fakes.ChunkTicketManagerInterface;
+import carpet.fakes.ServerChunkManagerInterface;
+import net.minecraft.server.world.ChunkTicketManager;
+import net.minecraft.server.world.ServerChunkManager;
+import net.minecraft.util.math.ChunkPos;
+
+public class SpawnChunks
+{
+    public static void changeSpawnChunks(ServerChunkManager chunkManager, ChunkPos pos, int size)
+    {
+        ChunkTicketManager ticketManager = ((ServerChunkManagerInterface)chunkManager).getTicketManager();
+        ((ChunkTicketManagerInterface)ticketManager).changeSpawnChunks(pos, size);
+    }
+}