appveyor.yml in winevt_c-0.9.3 vs appveyor.yml in winevt_c-0.10.0

@@ -18,15 +18,31 @@
   - bundle exec rake test TESTOPTS=-v
 
 # https://www.appveyor.com/docs/installed-software/#ruby
 environment:
   matrix:
+    - ruby_version: "31-x64"
+    - ruby_version: "31"
     - ruby_version: "30-x64"
     - ruby_version: "30"
     - ruby_version: "27-x64"
     - ruby_version: "27"
     - ruby_version: "26-x64"
     - ruby_version: "26"
     - ruby_version: "25-x64"
     - ruby_version: "25"
     - ruby_version: "24-x64"
     - ruby_version: "24"
+
+for:
+-
+  matrix:
+    only:
+      - ruby_version: "31-x64"
+  install:
+    - SET PATH=C:\Ruby%ruby_version%\bin;%PATH%
+    - ruby --version
+    - gem --version
+    - bundle --version
+    - ridk.cmd install 1 3
+    - ridk.cmd exec bundle install
+    - ridk.cmd exec bundle exec rake compile