[BUG] Short arrays from options.rng() or options.random result in invalid UUIDs

[broofa]

Description of the problem

Reporting on behalf of @gaoyia

If options.rng() or options.random evaluates to a too-short array (< 16 bytes), the resulting UUID is invalid.

Recipe for reproducing

import {v4} from 'uuid';
console.log(v4({random: new Uint8Array(15)}));
// -> 00000000-0000-4000-8000-0000000000undefined

Additional information

No response

Environment

No response