Add coverage report for githubci

Author: Asisyas

.github/workflows/ci.yaml

@@ -45,4 +45,14 @@ jobs:
           composer-options: "--prefer-dist --no-progress"
 
       - name: Run tests
-        run: composer run test
+        run: composer run test
+
+      - name: Coverage report
+        run: XDEBUG_MODE=coverage ./vendor/bin/phpunit --coverage-clover coverage.xml
+
+      - name: Upload coverage reports to Codecov
+        run: |
+          # Replace `linux` below with the appropriate OS
+          curl -Os https://uploader.codecov.io/latest/linux/codecov
+          chmod +x codecov
+          ./codecov -t ${CODECOV_TOKEN}