Added Maestro support

lib/index.js

@@ -39,6 +39,12 @@ let _defaults = {
       cardPattern: /^(?:2131|1800|35\d{3})\d{11}$/,
       partialPattern: /^(2131|1800|35)/,
       cvvPattern: /^\d{3}$/
+    },
+    MAESTRO: {
+      cardType: 'MAESTRO',
+      cardPattern: /^(?:6|5[068])[0-9]{12,19}/,
+      partialPattern: /^6|^5[068]/,
+      cvvPattern: /^\d{3}$/
     }
   },
   expiryMonths: {
@@ -65,6 +71,7 @@ _setupCardTypeAliases('AMERICANEXPRESS', ['ae', 'AE', 'ax', 'AX', 'amex', 'AMEX'
 _setupCardTypeAliases('DINERSCLUB', ['dinersclub']);
 _setupCardTypeAliases('DISCOVER', ['dc', 'DC', 'discover']);
 _setupCardTypeAliases('JCB', ['jcb']);
+_setupCardTypeAliases('MAESTRO', []);
 
 // Store original defaults. This must happen after aliases are setup
 const _originalDefaults = Merge({}, _defaults);