phpstan error for `pressKey`

[Florent-QE]

I updated the package from 4.0.2 to 4.0.3.

phpstan give me the error below now when running vendor/bin/phpstan --error-format=github.

Impacted line

$this->tester->pressKey($selector, ['ctrl', 'a'], \Facebook\WebDriver\WebDriverKeys::DELETE);

Error

Parameter #2 $chars of method Tests\Support\WebTester::pressKey() expects array<string, string>|string|null, array<int, string> given.

The pressKey() documentation suggests my code works, which is confirmed by my test.

The only error I am raising here is a phpstan issue.