Switch code coverage driver

Author: ivanvermeyen

.github/workflows/run-tests.yml

@@ -54,7 +54,7 @@ jobs:
         with:
           php-version: ${{ matrix.php }}
           extensions: dom, curl, libxml, mbstring, zip, pcntl, pdo, sqlite, pdo_sqlite, bcmath, soap, intl, gd, exif, iconv, imagick
-          coverage: pcov
+          coverage: xdebug
 
       - name: Install dependencies
         run: |