The `selectOption` method on `frame` only selects one option

[ankur22]

Tested against: grafana/xk6-browser@dbede12

The selectOption method on locator only selects one option.

In the below code it works against localhost:8080, which is a test server that can be found here with instructions on how to run it locally: https://github.com/ankur22/testserver.

import { sleep } from 'k6';
import launcher from 'k6/x/browser';

export default function () {
  const browser = launcher.launch('chromium', {
    headless: false,
  });
  const context = browser.newContext();
  const page = context.newPage();
  const res = page.goto('http://localhost:8080/other');
  const l = page.locator('#cars-options');
  sleep(1);
  l.selectOption(['land rover', 'ferrari']);

  sleep(10);
  browser.close();
}

I was expecting it to select two options on the test page, but it only selected the first one.