Single checkbox won't apply BS4 style

[lubosdz]

What steps will reproduce the problem?

use yii\bootstrap4\Html;
<?= Html::checkbox('allow_item') ?>

What's expected?

Checkbox with custom BS4 styling.

What do you get instead?

Checkbox with legacy Yii2 styling like via yii\helpers\Html.

Additional info

Q	A
Yii vesion	2.0.49.3
PHP version	8.2
Operating system	Windows

[mtangoo]

Can you create a PR with a fix?