add missing values

Author: ylebre

tests/unit/Enum/OpenId/OpenIdConnectMetadataTest.php

@@ -52,6 +52,9 @@ final public function getExpectedValues() : array
             'userinfo_encryption_enc_values_supported',
             'userinfo_endpoint',
             'userinfo_signing_alg_values_supported',
+            'token_types_supported',
+            'check_session_iframe',
+            'end_session_endpoint'
         ];
     }