Add support for multiple default values for a custom multiple field?

Hey,

I’m trying to develop a Custom Beaver module using the plugin documentation, and it works great. A big thank you for your work on this plugin.

I’ve noticed that at this point, there is no way to provide a multiple default value for a multiple field like this:

'field' => array(
	'multiple'     => true,
	'type'         => 'form',
	'label'        => esc_html__( 'Field', 'textdomain' ),
	'form'         => 'field',
	'preview_text' => 'label',
	'default'      => array(
		array(
			'label' => 'Field 1',
			'key' => 'key1'
		),
		array(
			'label' => 'Field 2',
			'key' => 'key2'
		)
	)
)

Stil, there could be an easy way of doing this; If in the final class FLBuilderModel, in the static method get_settings_form_defaults instead of forcing the default value to be an explicit array like this:

if ( $is_multiple && $supports_multiple ) {
	$defaults->$name = array( $default );
}

it would be a simple check like this:

if ( $is_multiple && $supports_multiple ) {
	$defaults->$name = is_array($default) ? $default : array( $default );
}

And this way we could easily initialize a multiple field with default values.

I would open a pull request or something but from what I could find there isn’t a GitHub repository or something where we could contribute?

Thanks,
Andrei