Switch appveyor to checking with 3.6

Author: mwchase

appveyor.yml

@@ -7,9 +7,9 @@ environment:
     WITH_COMPILER: 'cmd /E:ON /V:ON /C .\ci\appveyor-with-compiler.cmd'
   matrix:
     - TOXENV: check
-      TOXPYTHON: C:\Python27\python.exe
-      PYTHON_HOME: C:\Python27
-      PYTHON_VERSION: '2.7'
+      TOXPYTHON: C:\Python36\python.exe
+      PYTHON_HOME: C:\Python36
+      PYTHON_VERSION: '3.6'
       PYTHON_ARCH: '32'
     - TOXENV: '3.5-cover,codecov'
       TOXPYTHON: C:\Python35\python.exe

ci/templates/appveyor.yml

@@ -7,9 +7,9 @@ environment:
     WITH_COMPILER: 'cmd /E:ON /V:ON /C .\ci\appveyor-with-compiler.cmd'
   matrix:
     - TOXENV: check
-      TOXPYTHON: C:\Python27\python.exe
-      PYTHON_HOME: C:\Python27
-      PYTHON_VERSION: '2.7'
+      TOXPYTHON: C:\Python36\python.exe
+      PYTHON_HOME: C:\Python36
+      PYTHON_VERSION: '3.6'
       PYTHON_ARCH: '32'
 {% for env, config in tox_environments|dictsort %}{{ '' }}{% if config.python.startswith('python') %}
     - TOXENV: '{{ env }}{% if config.cover %},codecov{% endif %}'