(maint) Update flatland deps to latest versions
(maint) Update flatland deps to latest versions

This is needed to support compiling in java 11.

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