#712 Update appveyor [skip travis]

Signed-off-by: Uilian Ries <uilianries@gmail.com>

appveyor.yml

@@ -20,11 +20,6 @@ environment:
   enable_lua_shared: NO
   c_standard: auto
   cxx_standard: auto
-  install:
-    - set PATH=%PATH%;%PYTHON%/Scripts/
-    - pip.exe install conan conan_package_tools
-  test_script:
-    - python build.py
   matrix:
     # Use default values
     - id: Default-x86
@@ -487,3 +482,14 @@ cache:
 artifacts:
   - path: dist\*
 
+
+for:
+  -
+    matrix:
+      only:
+        - configuration: Release
+    install:
+      - set PATH=%PATH%;%PYTHON%/Scripts/
+      - pip.exe install conan conan_package_tools
+    test_script:
+      - python build.py