Git commits in Moodle 3.1.17 by Jun Pataleta

commit d33b9107f24f3b61b554086c0ecc810580746629
Author: Jun Pataleta <jun@moodle.com>
Date:   Wed, 30 Jan 2019 12:06:11 +0800
Tag:    v3.1.17

MDL-64725 composer: Use lowercase for package name of dev dependencies