Configure GitHub CI matrix build

Author: soc

.github/workflows/test.yml

@@ -8,15 +8,20 @@ on:
 
 jobs:
   build:
+    strategy:
+      matrix:
+        os:
+          - windows-latest
+          - ubuntu-latest
 
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up JDK 11
-      uses: actions/setup-java@v2
-      with:
-        java-version: '11'
-        distribution: 'adopt'
-    - name: Run tests
-      run: sbt test
+      - uses: actions/checkout@v4
+      - name: Set up JDK 11
+        uses: actions/setup-java@v2
+        with:
+          java-version: '11'
+          distribution: 'adopt'
+      - name: Run tests
+        run: sbt test