fix(isPassportNumber): update Poland country code (#1809)

* Updated Poland Country Code

* Updated PO to PL in validator.js

* Changed PO to PL in README.md

* Typo in README.md

Co-authored-by: Ronan Doudiès <rondou@eptm-it.ch>

README.md

@@ -145,7 +145,7 @@ Validator                               | Description
 **isMultibyte(str)**                    | check if the string contains one or more multibyte chars.
 **isNumeric(str [, options])**                      | check if the string contains only numbers.<br/><br/>`options` is an object which defaults to `{no_symbols: false}` it also has locale as an option. If `no_symbols` is true, the validator will reject numeric strings that feature a symbol (e.g. `+`, `-`, or `.`).<br/><br/>`locale` determine the decimal separator and is one of `['ar', 'ar-AE', 'ar-BH', 'ar-DZ', 'ar-EG', 'ar-IQ', 'ar-JO', 'ar-KW', 'ar-LB', 'ar-LY', 'ar-MA', 'ar-QA', 'ar-QM', 'ar-SA', 'ar-SD', 'ar-SY', 'ar-TN', 'ar-YE', 'bg-BG', 'cs-CZ', 'da-DK', 'de-DE', 'en-AU', 'en-GB', 'en-HK', 'en-IN', 'en-NZ', 'en-US', 'en-ZA', 'en-ZM', 'es-ES', 'fr-FR', 'fr-CA', 'hu-HU', 'it-IT', 'nb-NO', 'nl-NL', 'nn-NO', 'pl-PL', 'pt-BR', 'pt-PT', 'ru-RU', 'sl-SI', 'sr-RS', 'sr-RS@latin', 'sv-SE', 'tr-TR', 'uk-UA']`.
 **isOctal(str)**                        | check if the string is a valid octal number.
-**isPassportNumber(str, countryCode)**    | check if the string is a valid passport number.<br/><br/>(countryCode is one of `[ 'AM', 'AR', 'AT', 'AU', 'BE', 'BG', 'BY', 'BR', 'CA', 'CH', 'CN', 'CY', 'CZ', 'DE', 'DK', 'DZ', 'EE', 'ES', 'FI', 'FR', 'GB', 'GR', 'HR', 'HU', 'IE' 'IN', 'IR', 'ID', 'IS', 'IT', 'JP', 'KR', 'LT', 'LU', 'LV', 'LY', 'MT', 'MY', 'MZ', 'NL', 'PO', 'PT', 'RO', 'RU', 'SE', 'SL', 'SK', 'TR', 'UA', 'US' ]`.
+**isPassportNumber(str, countryCode)**    | check if the string is a valid passport number.<br/><br/>(countryCode is one of `[ 'AM', 'AR', 'AT', 'AU', 'BE', 'BG', 'BY', 'BR', 'CA', 'CH', 'CN', 'CY', 'CZ', 'DE', 'DK', 'DZ', 'EE', 'ES', 'FI', 'FR', 'GB', 'GR', 'HR', 'HU', 'IE' 'IN', 'IR', 'ID', 'IS', 'IT', 'JP', 'KR', 'LT', 'LU', 'LV', 'LY', 'MT', 'MY', 'MZ', 'NL', 'PL', 'PT', 'RO', 'RU', 'SE', 'SL', 'SK', 'TR', 'UA', 'US' ]`.
 **isPort(str)**                         | check if the string is a valid port number.
 **isPostalCode(str, locale)**           | check if the string is a postal code,<br/><br/>(locale is one of `[ 'AD', 'AT', 'AU', 'AZ', 'BE', 'BG', 'BR', 'BY', 'CA', 'CH', 'CN', 'CZ', 'DE', 'DK', 'DO', 'DZ', 'EE', 'ES', 'FI', 'FR', 'GB', 'GR', 'HR', 'HT', 'HU', 'ID', 'IE' 'IL', 'IN', 'IR', 'IS', 'IT', 'JP', 'KE', 'KR', 'LI', 'LK', 'LT', 'LU', 'LV', 'MT', 'MX', 'MY', 'NL', 'NO', 'NP', 'NZ', 'PL', 'PR', 'PT', 'RO', 'RU', 'SA', 'SE', 'SG', 'SI', 'TH', 'TN', 'TW', 'UA', 'US', 'ZA', 'ZM' ]` OR 'any'. If 'any' is used, function will check if any of the locals match. Locale list is `validator.isPostalCodeLocales`.).
 **isRFC3339(str)**                      | check if the string is a valid [RFC 3339](https://tools.ietf.org/html/rfc3339) date.

src/lib/isPassportNumber.js

@@ -47,7 +47,7 @@ const passportRegexByCountryCode = {
   MZ: /^([A-Z]{2}\d{7})|(\d{2}[A-Z]{2}\d{5})$/, // MOZAMBIQUE
   MY: /^[AHK]\d{8}$/, // MALAYSIA
   NL: /^[A-Z]{2}[A-Z0-9]{6}\d$/, // NETHERLANDS
-  PO: /^[A-Z]{2}\d{7}$/, // POLAND
+  PL: /^[A-Z]{2}\d{7}$/, // POLAND
   PT: /^[A-Z]\d{6}$/, // PORTUGAL
   RO: /^\d{8,9}$/, // ROMANIA
   RU: /^\d{2}\d{2}\d{6}$/, // RUSSIAN FEDERATION

test/validators.js

@@ -3000,7 +3000,7 @@ describe('Validators', () => {
 
     test({
       validator: 'isPassportNumber',
-      args: ['PO'],
+      args: ['PL'],
       valid: [
         'ZS 0000177',
         'AN 3000011',