generate xml coverage report

Author: faissaloux

Diff for: .github/workflows/tests.yml

@@ -28,7 +28,7 @@ jobs:
       run: composer update --${{ matrix.dependency-version }} --no-interaction --no-progress --ansi
 
     - name: Unit Tests
-      run: composer test:unit -- --coverage-html
+      run: composer test:unit -- --coverage-xml coverage.xml
 
     - name: Upload coverage reports to Codecov
       uses: codecov/[email protected]