[site-reviews] add custom notification template tags

/**
 * @param array $data
 * @param \GeminiLabs\SiteReviews\Modules\Email $email
 * @return array
 */
add_filter('site-reviews/email/compose', function ($data, $email) {
    if (!isset($email->data['review'])) {
        return $data;
    }
    $review = $email->data['review'];
    // Add custom fields to the notification template tags array like this:
    // $data['template-tags']['custom_tag_name'] = $review->custom->custom_field_name;
    $data['template-tags']['review_telephone'] = $review->custom->telephone;
    return $data;
}, 10, 2);