Git commits in Moodle 3.8.x by Frédéric Massart

commit f130c810f903d078b4cc1b8f2961248ebf8e3e8d
Author: Frédéric Massart <fred@branchup.tech>
Date:   Tue, 03 Dec 2019 13:03:43 +0800
Tag:    v3.8.1

MDL-67434 javascript: Use static get_string after recycling promise

commit f3847964b667380114bf34312397e077ff475452
Author: Frédéric Massart <fred@branchup.tech>
Date:   Fri, 30 Aug 2019 22:25:50 +0800
Tag:    v3.8.0-beta

MDL-66502 javascript: Remove extension from AMD module names