Simple Pricing Table - open links in new window

functions.php

<?php
// Do NOT include the opening php tag.

add_filter( 'spt_markup_link_open', 'prefix_spt_button_markup' );
/**
 * Open Simple Pricing Table links in new tab.
 *
 * @since 1.0.0
 *
 * @return string
 */
function prefix_spt_button_markup() {
	return '<a class="pricing-table__link" href="%s" target="_blank">';
}