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

Update to ddev 1.6.0

See merge request t3o/typo3.org!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 test:php #12492

00:00:20

 
  Build
passed build #12493

00:00:28

 
  Layout
passed layout #12494

00:02:02