Update appveyor.yml

Author: AtsushiSakai

appveyor.yml

@@ -6,9 +6,9 @@ environment:
     CMD_IN_ENV: "cmd /E:ON /V:ON /C .\\appveyor\\run_with_env.cmd"
 
   matrix:
-    - PYTHON: "C:\\Python36-x64"
-      PYTHON_VERSION: "3.6.x" # currently 3.6.5
-      PYTHON_ARCH: "64"
+    - PYTHON_VERSION: 3.6
+      MINICONDA: C:\Miniconda3
+
 
 init:
   - "ECHO %MINICONDA% %PYTHON_VERSION% %PYTHON_ARCH%"