BE vat number should start with 0 or 1, then 9 digits. closes #62

Author: dannyvankooten

src/Validator.php

@@ -14,7 +14,7 @@ class Validator
      */
     private $patterns = [
         'AT' => 'U[A-Z\d]{8}',
-        'BE' => '(0\d{9}|\d{10})',
+        'BE' => '(0|1)\d{9}',
         'BG' => '\d{9,10}',
         'CY' => '\d{8}[A-Z]',
         'CZ' => '\d{8,10}',