fix(isBIC): add XK to accepted BIC country codes (#2046)

Author: ejcheng

src/lib/isBIC.js

@@ -9,7 +9,9 @@ export default function isBIC(str) {
 
   // toUpperCase() should be removed when a new major version goes out that changes
   // the regex to [A-Z] (per the spec).
-  if (!CountryCodes.has(str.slice(4, 6).toUpperCase())) {
+  const countryCode = str.slice(4, 6).toUpperCase();
+
+  if (!CountryCodes.has(countryCode) && countryCode !== 'XK') {
     return false;
   }
 

test/validators.test.js

@@ -5183,6 +5183,7 @@ describe('Validators', () => {
         'SBICKEN1',
         'SBICKENY',
         'SBICKEN1YYP',
+        'SBICXKN1YYP',
       ],
       invalid: [
         'SBIC23NXXX',
@@ -5191,6 +5192,7 @@ describe('Validators', () => {
         'SBICKENXX9',
         'SBICKEN13458',
         'SBICKEN',
+        'SBICXK',
       ],
     });
   });