Fix forgotten dict update

Author: flashsturz

firebase/firestore/_utils.py

@@ -36,6 +36,8 @@ def _from_datastore(data):
 			else:
 				data_to_restructure[key] = {}
 
+			data_to_restructure[key] = dic
+
 		elif isinstance(val.get('arrayValue'), dict):
 			arr = []