Change PHPUnit deprecation helper mode to max[direct]=0

See https://symfony.com/doc/current/components/phpunit_bridge.html#direct-and-indirect-deprecations

Author: ruudk

Diff for: phpunit.xml.dist

@@ -25,7 +25,7 @@
 
     <php>
       <ini name="error_reporting" value="-1" />
-      <env name="SYMFONY_DEPRECATIONS_HELPER" value="999999" />
+      <env name="SYMFONY_DEPRECATIONS_HELPER" value="max[direct]=0" />
     </php>
     <listeners>
         <listener class="Symfony\Bridge\PhpUnit\SymfonyTestsListener" />