class-field directive does not work

Expected behavior

I should be able to set the class attribute for a field in solid-widget, but this does not work.

What's happening?

I'm using this code :

<solid-display
    fields="name, event_set"
    widget-name="h2"
    class-name="event-type"
><solid-display>

The generated HTML is

<div>
      <solid-display  fields="name, event_set" widget-name="h2" class-name="event-type"><div>
          <h2>agora nationale</h2>
      </div></solid-display>
</div>

the class attribute is missing. I would like to see <h2 class="event-type"> instead.

Your Environment

(Include relevant details about the environment you experienced the bug in)

• Library version: sib core 0.12.5

• Browser name and version: Firefowx 81

• Operating System and version (desktop or mobile): Ubuntu

• Targeted application: Hubl