Enable testing on windows in CI

Author: josbeir

.github/workflows/ci.yml

@@ -11,13 +11,15 @@ env:
 
 jobs:
   test:
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
+        os: [ubuntu-latest, windows-latest]
         php-version: [8.2, 8.3, 8.4, 8.5]
         prefer-lowest: ['']
         include:
           - php-version: '8.2'
+            os: ubuntu-latest
             prefer-lowest: 'prefer-lowest'
 
     steps: