[site-reviews] Add "reply-to" header to email notifications

/**
 * @param array $details
 * @param \GeminiLabs\SiteReviews\Modules\Email $email
 * @return array
 */
add_filter('site-reviews/email/compose', function ($details, $email) {
    // Get the email address submitted with the review
    $emailAddress = glsr_get($email, 'data.review.email');
    // If an email was submitted with the review, use it as the reply-to header
    if (!empty($emailAddress)) {
        $details['reply-to'] = $emailAddress;
    }
    return $details;
}, 10, 2);