(maint) Bump docker-compose to 1.28.6
(maint) Bump docker-compose to 1.28.6

 - This will be necessary for moving away from deprecated -no-ansi flag

puppetlabs/puppet-server,puppetlabs/puppet-server,puppetlabs/puppetserver,puppetlabs/puppetserver,puppetlabs/puppet-server,puppetlabs/puppetserver,puppetlabs/puppetserver