How to move the role dropdown to the top of the form

wpum_move_role_dropdown_to_top.php

<?php

add_filter( 'wpum_get_registration_fields', 'my_wpum_get_registration_fields' );
function my_wpum_get_registration_fields( $fields ) {
	if ( isset( $fields['role'] ) ) {
		$fields['role']['priority'] = - 1;
	}

	return $fields;
}