Merge pull request #21 from melihovv/patch-1

Fix Fatal error: Uncaught Error: Class 'Doctrine\Common\DataFixtures\Purger\ORMPurger' not found in

src/Codeception/Module/Doctrine2.php

@@ -138,7 +138,7 @@ class Doctrine2 extends CodeceptionModule implements DependsOnModule, DataMapper
         'cleanup' => true,
         'connection_callback' => false,
         'depends' => null,
-        'purge_mode' => ORMPurger::PURGE_MODE_DELETE,
+        'purge_mode' => 1, // ORMPurger::PURGE_MODE_DELETE
     ];
 
     protected $dependencyMessage = <<<EOF