Fix puppetlabs/stdlib and puppetlabs/apt dependencies

[khaefeli]

the metadata.json requires the old stdlib version <4.13.0

make sure that this module supports the latest stdlib version.
otherwise it blocks people from upgrading

[R10K::TaskRunner - ERROR] Task #<R10K::Task::Module::Sync:0x00000001de1858> failed while running: "puppet module --modulepath '/home/vagrant/puppet/modules' install --version=4.25.1 --ignore-dependencies puppetlabs/stdlib" returned with non-zero exit value #<Process::Status: pid 17534 exit 1>

update: same for the apt package which is 3.0.0 (latest version on forge: 4.5.1)

is also related to #65 and #70