Comment out Python 3.6 so we can see what happens with 3.7

Author: tleonhardt

.appveyor.yml

@@ -7,10 +7,10 @@ environment:
       PYTHON_ARCH: "64"
       TOXENV: "py35"
 
-    - PYTHON: "C:\\Python36-x64"
-      PYTHON_VERSION: "3.6.x"
-      PYTHON_ARCH: "64"
-      TOXENV: "py36"
+#    - PYTHON: "C:\\Python36-x64"
+#      PYTHON_VERSION: "3.6.x"
+#      PYTHON_ARCH: "64"
+#      TOXENV: "py36"
 
     - PYTHON: "C:\\Python37-x64"
       PYTHON_VERSION: "3.7.x"