appveyor: Use ridk

Signed-off-by: Kenji Okimoto <okimoto@clear-code.com>

Author: okkez

appveyor.yml

@@ -5,10 +5,11 @@ version: '{build}'
 
 install:
   - SET PATH=C:\Ruby%ruby_version%\bin;%PATH%
-  - "%devkit%\\devkitvars.bat"
+  - IF %ridk%==0 "%devkit%\\devkitvars.bat"
   - ruby --version
   - gem --version
-  - bundle install
+  - IF %ridk%==0 bundle install
+  - IF %ridk%==1 ridk.cmd exec bundle install
 build: off
 test_script:
   - bundle exec rake test
@@ -17,26 +18,32 @@ test_script:
 environment:
   matrix:
     - ruby_version: "25-x64"
-      devkit: C:\Ruby25-x64\DevKit
+      ridk: 1
     - ruby_version: "25"
-      devkit: C:\Ruby25\DevKit
+      ridk: 1
     - ruby_version: "24-x64"
-      devkit: C:\Ruby24-x64\DevKit
+      ridk: 1
     - ruby_version: "24"
-      devkit: C:\Ruby24\DevKit
+      ridk: 1
     - ruby_version: "23-x64"
       devkit: C:\Ruby23-x64\DevKit
+      ridk: 0
     - ruby_version: "23"
       devkit: C:\Ruby23\DevKit
+      ridk: 0
     - ruby_version: "22-x64"
       devkit: C:\Ruby22-x64\DevKit
+      ridk: 1
     - ruby_version: "21-x64"
       devkit: C:\Ruby21-x64\DevKit
+      ridk: 1
     - ruby_version: "22"
       devkit: C:\Ruby22\DevKit
+      ridk: 1
       WIN_RAPID: true
     - ruby_version: "21"
       devkit: C:\Ruby21\DevKit
+      ridk: 1
       WIN_RAPID: true
 matrix:
   allow_failures: