fix: wrong python binary for py36 on windows (#360)

Author: hredestig

appveyor.yml

@@ -20,7 +20,7 @@ environment:
       PYTHON_VERSION: "3.5.2"
       PYTHON_ARCH: "32"
 
-    - PYTHON: "C:\\Python35"
+    - PYTHON: "C:\\Python36"
       PYTHON_VERSION: "3.6.0"
       PYTHON_ARCH: "32"
 
@@ -36,7 +36,7 @@ environment:
       PYTHON_VERSION: "3.5.2"
       PYTHON_ARCH: "64"
 
-    - PYTHON: "C:\\Python35-x64"
+    - PYTHON: "C:\\Python36-x64"
       PYTHON_VERSION: "3.6.0"
       PYTHON_ARCH: "64"