[Merge] lp:~ubuntu-mate-dev/ubuntu-release-upgrader/ubuntu-mate-bionic-update into lp:ubuntu-release-upgrader

[Martin Wimpress]

Thanks for the clarification Adam, I've updated KeyDependencies accordingly.
-- 
https://code.launchpad.net/~ubuntu-mate-dev/ubuntu-release-upgrader/ubuntu-mate-bionic-update/+merge/342372
Your team Ubuntu Core Development Team is subscribed to branch lp:ubuntu-release-upgrader.