fixed merger ordering issue

src/merger/mod.rs

@@ -792,7 +792,7 @@ impl Merger {
     };
 
     for table_name in &entity_type.hierarchy {
-      let table_fields = match grouped_fields.get(&table_name).and_then(|v| v.as_array()) {
+      let table_fields = match grouped_fields.get(table_name).and_then(|v| v.as_array()) {
         Some(arr) => arr
           .iter()
           .filter_map(|v| v.as_str().map(|s| s.to_string()))