Merge branch 'develop' into felixdivo-patch-usb2can-warning

Author: felixdivo

.appveyor.yml

@@ -3,14 +3,10 @@ environment:
 
     # For Python versions available on Appveyor, see
     # https://www.appveyor.com/docs/windows-images-software/#python
-    # Python pre-2.7 and 3.0-3.4 have reached EOL
+    # Only Python 3.6+ is supported
 
-    - PYTHON: "C:\\Python27"
-    - PYTHON: "C:\\Python35"
     - PYTHON: "C:\\Python36"
     - PYTHON: "C:\\Python37"
-    - PYTHON: "C:\\Python27-x64"
-    - PYTHON: "C:\\Python35-x64"
     - PYTHON: "C:\\Python36-x64"
     - PYTHON: "C:\\Python37-x64"