Update tests.yml (#44)

Author: driesvints

.github/workflows/tests.yml

@@ -25,6 +25,7 @@ jobs:
         uses: shivammathur/setup-php@v2
         with:
           php-version: ${{ matrix.php }}
+          ini-values: error_reporting=E_ALL
           tools: composer:v2
           coverage: none