Prepare Drush 9
So far we can use Drush 9 beta4 but before we can go to beta8 or later we need to
- replace global launcher from Compoer to the one in /usr/local/bin, see https://github.com/drush-ops/drush-launcher
- redefine aliases, also in conrtabs
So far we can use Drush 9 beta4 but before we can go to beta8 or later we need to