Try with Windows

Author: hsbt

.github/workflows/test.yml

@@ -13,7 +13,10 @@ jobs:
     strategy:
       matrix:
         ruby: ${{ fromJson(needs.ruby-versions.outputs.versions) }}
-        os: [ ubuntu-latest, macos-latest ]
+        os: [ ubuntu-latest, macos-latest, windows-latest ]
+        exclude:
+          - { os: windows-latest, ruby: truffleruby-head }
+          - { os: windows-latest, ruby: truffleruby }
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v3