Update phpunit.xml to display deprecations

Author: michalbundyra

.github/workflows/tests.yml

@@ -704,4 +704,4 @@ jobs:
         run: composer require phpunit/phpunit:~${{ matrix.phpunit-version }} --no-interaction --no-progress
 
       - name: PHPUnit
-        run: vendor/bin/phpunit --display-deprecations
+        run: vendor/bin/phpunit

phpunit.xml

@@ -1,6 +1,8 @@
 <phpunit
          xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-         xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/4.3/phpunit.xsd"
+         xsi:noNamespaceSchemaLocation="vendor/phpunit/phpunit/phpunit.xsd"
+         displayDetailsOnPhpunitDeprecations="true"
+         displayDetailsOnTestsThatTriggerDeprecations="true"
          bootstrap="vendor/autoload.php">
     <testsuite name="Unit tests">
         <directory>tests/</directory>