Git commits in Moodle 3.8.6 by Claude Vervoort

commit 6d79bed31b54a6b049678b07f8111de7958ec4b3
Author: Claude Vervoort <claude.vervoort@cengage.com>
Date:   Fri, 02 Oct 2020 03:12:15 +0800
Tag:    v3.8.6

MDL-57756 mod_lti: params change to text type