appveyor: Organize ruby versions

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

Author: okkez

appveyor.yml

@@ -12,19 +12,27 @@ test_script:
 # https://www.appveyor.com/docs/installed-software/#ruby
 environment:
   matrix:
+    - ruby_version: "25-x64"
+      devkit: C:\Ruby25-x64\DevKit
+    - ruby_version: "25"
+      devkit: C:\Ruby25\DevKit
+    - ruby_version: "24-x64"
+      devkit: C:\Ruby24-x64\DevKit
+    - ruby_version: "24"
+      devkit: C:\Ruby24\DevKit
     - ruby_version: "23-x64"
       devkit: C:\Ruby23-x64\DevKit
     - ruby_version: "23"
       devkit: C:\Ruby23\DevKit
     - ruby_version: "22-x64"
-      devkit: C:\Ruby23-x64\DevKit
+      devkit: C:\Ruby22-x64\DevKit
     - ruby_version: "21-x64"
-      devkit: C:\Ruby23-x64\DevKit
+      devkit: C:\Ruby21-x64\DevKit
     - ruby_version: "22"
-      devkit: C:\Ruby23\DevKit
+      devkit: C:\Ruby22\DevKit
       WIN_RAPID: true
     - ruby_version: "21"
-      devkit: C:\Ruby23\DevKit
+      devkit: C:\Ruby21\DevKit
       WIN_RAPID: true
 matrix:
   allow_failures: