[site-reviews] get additional notification emails from the assigned post meta

/**
 * @param array $emails
 * @param \GeminiLabs\SiteReviews\Review $review
 * @return array
 */
add_filter('site-reviews/notification/emails', function ($emails, $review) {
    $posts = $review->assignedPosts();
    foreach ($posts as $post) {
        $email = get_post_meta($post->ID, 'company_email', true);
        if (is_email($email)) {
            $emails[] = $email;
        }
    }
    return $emails;
}, 10, 2);