Developer credits
Git commits in Moodle x.x.x by David Thompson
commit 5bc86614a2dface8ed31ad2f2449478c15616aa2 Author: David Thompson <david.thompson@catalyst.net.nz> Date: Tue, 21 Apr 2020 04:48:39 +0800 Tag: v3.9.0-beta MDL-68477 libraries: support for Chart.js legend options.
commit ab0d4099915fc96980144635a6365ca6cd414238 Author: David Thompson <david.thompson@catalyst.net.nz> Date: Thu, 09 Apr 2020 09:14:31 +0800 Tag: v3.9.0-beta MDL-68386 libraries: Enhancement for Area Charts support with chart.js.