www/smarty3: Update from 3.1.29 to 3.1.30

Changelog: https://github.com/smarty-php/smarty/blob/v3.1.30/change_log.txt

PR: 224564
Reported by: Matthias Fechner <idefix@fechner.net>
Approved by: maintainer timeout (2 weeks) tcberner (mentor)
Differential Revision: https://reviews.freebsd.org/D13684