updated docs

Author: Iulian Masar

MangoPay/IdentityVerification.php

@@ -16,7 +16,7 @@ class IdentityVerification extends Libraries\EntityBase
      *  <p>VALIDATED – The session was successful.</p>
      *  <p>REFUSED – The session was refused.</p>
      *  <p>REVIEW – The session is under manual review by Mangopay.</p>
-     *  <p>OUTDATED – The session is no longer valid (likely due to expired documents used during the session).</p>
+     *  <p>OUT_OF_DATE – The session is no longer valid (likely due to expired documents used during the session).</p>
      *  <p>TIMEOUT – The session timed out due to inactivity.</p>
      *  <p>ERROR – The session was not completed because an error occurred.</p>
      * @var string