Remove coalesce operator

Remove strict types declaration

tests/Runtime/RuntimeMockup.php

@@ -26,7 +26,7 @@ class RuntimeMockup extends Runtime
 
     public function getRanCommandTimeoutFor($cmd)
     {
-        return $this->ranCommandTimeouts[$cmd] ?? null;
+        return isset($this->ranCommandTimeouts[$cmd]) ? $this->ranCommandTimeouts[$cmd] : null;
     }
 
     /**

tests/Task/BuiltIn/Symfony/AsseticDumpTaskTest.php

@@ -1,4 +1,4 @@
-<?php declare(strict_types=1);
+<?php
 
 namespace Mage\tests\Task\BuiltIn\Symfony;