Update forge for new block API

worldedit-core/src/main/java/com/sk89q/worldedit/world/block/BlockType.java

@@ -168,6 +168,17 @@ public class BlockType {
         return ImmutableList.copyOf(getBlockStatesMap().values());
     }
 
+    /**
+     * Gets a state of this BlockType with the given properties.
+     *
+     * @return The state, if it exists
+     */
+    public BlockState getState(Map<Property<?>, Object> key) {
+        BlockState state = getBlockStatesMap().get(key);
+        checkArgument(state != null, "%s has no state for %s", this, key);
+        return state;
+    }
+
     /**
      * Gets whether this block type has an item representation.
      *