IBANBuilder failure

[LoganGrier]

The random iban generator sometimes generates an invalid iban and throws an exception. Here is a failing code snippet:

import {IBANBuilder} from 'ibankit';

for (let i = 0 ; i < 100; ++i) {
  console.log(new IBANBuilder().build())
}

Exception:

C:\Users\lagri\clones\temp\node_modules\ibankit\src\exceptions.ts:46
    super(msg);
    ^
FormatException [Error]: [88JFGW92NHDQJQZY88H5482] length is 23, expected BBAN length is: 26
    at new FormatException (C:\Users\lagri\clones\temp\node_modules\ibankit\src\exceptions.ts:46:5)
    at BbanStructure.validateBbanLength (C:\Users\lagri\clones\temp\node_modules\ibankit\src\bbanStructure.ts:954:13)
    at BbanStructure.validate (C:\Users\lagri\clones\temp\node_modules\ibankit\src\bbanStructure.ts:880:10)
    at validateBban (C:\Users\lagri\clones\temp\node_modules\ibankit\src\ibanUtil.ts:92:13)
    at Object.validate (C:\Users\lagri\clones\temp\node_modules\ibankit\src\ibanUtil.ts:56:3)
    at IBANBuilder.build (C:\Users\lagri\clones\temp\node_modules\ibankit\src\ibanBuilder.ts:164:16)
    at Object.<anonymous> (C:\Users\lagri\clones\temp\index.ts:4:33)
    at Module._compile (internal/modules/cjs/loader.js:999:30)
    at Module.m._compile (C:\Users\lagri\clones\temp\node_modules\ts-node\src\index.ts:1310:23)
    at Module._extensions..js (internal/modules/cjs/loader.js:1027:10) {
  formatViolation: 14,
  expected: '23',
  actual: '26'
}