Merge pull request #38 from slovdahl/fix-websockets-version

Revert websockets minimum version bump

Author: yozik04

setup.cfg

@@ -30,7 +30,7 @@ packages =
     vallox_websocket_api
 python_requires = >=3.6.0, <4
 install_requires =
-    websockets >= 11.0.1, < 12.0
+    websockets >= 9.1, < 12.0
     construct >= 2.9.0, < 3.0.0
 tests_require =
     pytest