adding Maestro credit card ranges

README.md

@@ -102,7 +102,7 @@ Validator                               | Description
 **isBoolean(str [, options])**          | check if the string is a boolean.<br/>`options` is an object which defaults to `{ loose: false }`. If `loose` is is set to false, the validator will strictly match ['true', 'false', '0', '1']. If `loose` is set to true, the validator will also match 'yes', 'no', and will match a valid boolean string of any case. (e.g.: ['true', 'True', 'TRUE']).
 **isBtcAddress(str)**            | check if the string is a valid BTC address.
 **isByteLength(str [, options])**          | check if the string's length (in UTF-8 bytes) falls in a range.<br/><br/>`options` is an object which defaults to `{ min: 0, max: undefined }`.
-**isCreditCard(str [, options])**                   | check if the string is a credit card number.<br/><br/> `options` is an optional object that can be supplied with the following key(s): `provider` is an optional key whose value should be a string, and defines the company issuing the credit card. Valid values include `['amex', 'dinersclub', 'discover', 'jcb', 'mastercard', 'unionpay', 'visa']` or blank will check for any provider. 
+**isCreditCard(str [, options])**                   | check if the string is a credit card number.<br/><br/> `options` is an optional object that can be supplied with the following key(s): `provider` is an optional key whose value should be a string, and defines the company issuing the credit card. Valid values include `['amex', 'dinersclub', 'discover', 'jcb', 'mastercard', 'unionpay', 'visa','maestro']` or blank will check for any provider. 
 **isCurrency(str [, options])**            | check if the string is a valid currency amount.<br/><br/>`options` is an object which defaults to `{ symbol: '$', require_symbol: false, allow_space_after_symbol: false, symbol_after_digits: false, allow_negatives: true, parens_for_negatives: false, negative_sign_before_digits: false, negative_sign_after_digits: false, allow_negative_sign_placeholder: false, thousands_separator: ',', decimal_separator: '.', allow_decimal: true, require_decimal: false, digits_after_decimal: [2], allow_space_after_digits: false }`.<br/>**Note:** The array `digits_after_decimal` is filled with the exact number of digits allowed not a range, for example a range 1 to 3 will be given as [1, 2, 3].
 **isDataURI(str)**                      | check if the string is a [data uri format][Data URI Format].
 **isDate(str [, options])**          | check if the string is a valid date. e.g. [`2002-07-15`, new Date()].<br/><br/> `options` is an object which can contain the keys `format`, `strictMode` and/or `delimiters`.<br/><br/>`format` is a string and defaults to `YYYY/MM/DD`.<br/><br/>`strictMode` is a boolean and defaults to `false`. If `strictMode` is set to true, the validator will reject strings different from `format`.<br/><br/> `delimiters` is an array of allowed date delimiters and defaults to `['/', '-']`.

src/lib/isCreditCard.js

@@ -7,6 +7,7 @@ const cards = {
   discover: /^6(?:011|5[0-9][0-9])[0-9]{12,15}$/,
   jcb: /^(?:2131|1800|35\d{3})\d{11}$/,
   mastercard: /^5[1-5][0-9]{2}|(222[1-9]|22[3-9][0-9]|2[3-6][0-9]{2}|27[01][0-9]|2720)[0-9]{12}$/, // /^[25][1-7][0-9]{14}$/;
+  maestro: /^(493698|50(0[0-9]{3}|4(1[0-7][0-4]|7[6-9][0-9]))|50[678](7[789][0-9]|9[0-9]{2})|5[6-9]|63|67|6)\d{6,19}$/,
   unionpay: /^(6[27][0-9]{14}|^(81[0-9]{14,17}))$/,
   visa: /^(?:4[0-9]{12})(?:[0-9]{3,6})?$/,
 };

test/validators.test.js

@@ -5437,6 +5437,9 @@ describe('Validators', () => {
         '4716989580001715211',
         '8171999927660000',
         '8171999900000000021',
+        '5899162000000000',
+        '6759649826438453',
+        '6799990100000000019',
       ],
       invalid: [
         'foo',
@@ -5471,6 +5474,32 @@ describe('Validators', () => {
     });
   });
 
+  it('should validate Maestro provided credit cards', () => {
+    test({
+      validator: 'isCreditCard',
+      args: [{ provider: 'Maestro' }],
+      valid: [
+        '6759649826438453',
+        '6799990100000000019',
+        '6283875070985593',
+      ],
+      invalid: [
+        'foo',
+        '2222155765072228',
+        '2225855203075256',
+        '2720428011723762',
+        '2718760626256570',
+        '36050234196908',
+        '375556917985515999999993',
+        '4716461583322103',
+        '4716-2210-5188-5662',
+        '4716989580001715211',
+        '4929 7226 5379 7141',
+        '5398228707871527',
+        '6234917882863855suffix',
+      ],
+    });
+  });
 
   it('should validate AmEx provided credit cards', () => {
     test({