Removed 3.5 from build matrix as 3.6 is not backwards compatible and some tests will break because of this in 3.5.
Removed 3.5 from build matrix as 3.6 is not backwards compatible and some tests will break because of this in 3.5.

WaldurChatbot/Waldur-Chatbot,WaldurChatbot/Waldur-Chatbot,WaldurChatbot/Waldur-Chatbot