update n2d package

src/main/java/com/terraforged/fm/template/processor/BlockReplacer.java

@@ -0,0 +1,19 @@
+package com.terraforged.fm.template.processor;
+
+import net.minecraft.block.BlockState;
+
+import java.util.Map;
+
+public class BlockReplacer implements StateProcessor {
+
+    private final Map<BlockState, BlockState> states;
+
+    public BlockReplacer(Map<BlockState, BlockState> states) {
+        this.states = states;
+    }
+
+    @Override
+    public BlockState process(BlockState state) {
+        return states.getOrDefault(state, state);
+    }
+}

src/main/java/com/terraforged/fm/template/processor/StateProcessor.java

@@ -0,0 +1,8 @@
+package com.terraforged.fm.template.processor;
+
+import net.minecraft.block.BlockState;
+
+public interface StateProcessor {
+
+    BlockState process(BlockState state);
+}