Merge branch 'task/update-to-ddev-1-6-0' into 'develop'

Update to ddev 1.6.0

See merge request !267
3 jobs for 392-activate-linkchecker-module in 2 minutes and 51 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #12492
test:php

00:00:20

 
  Build
passed #12493
build

00:00:28

 
  Layout
passed #12494
layout

00:02:02