add region_id to ibge_pib

ibge_pib.json

@@ -12,6 +12,11 @@
             "keys": ["estado_id"],
             "reference_columns": ["id"],
             "reference_table": "estado"
+        },
+        {
+            "keys": ["regiao_id"],
+            "reference_columns": ["id"],
+            "reference_table": "regiao"
         }
     ]
 }