Merge branch '5.1'

Author: sebastianbergmann

.github/workflows/ci.yml

@@ -73,7 +73,7 @@ jobs:
         uses: "shivammathur/setup-php@v2"
         with:
           php-version: "${{ matrix.php-version }}"
-          coverage: "pcov"
+          coverage: "xdebug"
           ini-values: memory_limit=-1
 
       - name: "Install dependencies with Composer"