Merge pull request #8 from adammhaile/master

Fix missing BytesIO import

Author: AndyEveritt

duetwebapi/api/base.py

@@ -1,5 +1,5 @@
 from typing import Dict, List, Union
-from io import StringIO, TextIOWrapper
+from io import StringIO, TextIOWrapper, BytesIO
 import requests
 import os
 import logging