buttonAsLink option doesn't work on Inline Repeaters

[danieldevine]

Description

The buttonAsLink option has no effect in an inline repeater using the form builder.

Steps to reproduce

Add an inline repeater field in a block component and add the buttonAsLink option.

InlineRepeater::make()->name('buttons')
            ->fields([
                Input::make()->name('title'),
                Input::make()->name('url'),
            ])->buttonAsLink(true);

Expected result

The button should display as a centred text link

Actual result

Undefined method 'buttonAsLink'

Versions

Twill version: 3.2.0