fix validation for Maestro UK card numbers

Author: xabbuh

Constraints/CardSchemeValidator.php

@@ -67,7 +67,8 @@ class CardSchemeValidator extends ConstraintValidator
         'MAESTRO' => array(
             '/^(6759[0-9]{2})[0-9]{6,13}$/',
             '/^(50[0-9]{4})[0-9]{6,13}$/',
-            '/^([56-69][0-9]{4})[0-9]{6,13}$/',
+            '/^5[6-9][0-9]{10,17}$/',
+            '/^6[0-9]{11,18}$/',
         ),
         // All MasterCard numbers start with the numbers 51 through 55. All have 16 digits.
         'MASTERCARD' => array(

Tests/Constraints/CardSchemeValidatorTest.php

@@ -90,8 +90,10 @@ public function getValidNumbers()
             array('LASER', '6771656738314582216'),
             array('MAESTRO', '6759744069209'),
             array('MAESTRO', '5020507657408074712'),
+            array('MAESTRO', '5612559223580173965'),
             array('MAESTRO', '6759744069209'),
             array('MAESTRO', '6759744069209'),
+            array('MAESTRO', '6594371785970435599'),
             array('MASTERCARD', '5555555555554444'),
             array('MASTERCARD', '5105105105105100'),
             array('VISA', '4111111111111111'),