Puppet 5 will only recieve fixes and security
updates to May 2020 [1]. See quote [2].
Since we support Puppet 6 already this is not
an issue. The Ussuri release will be around
the 2020-05-13 date [3] which will be almost
the same time as the Puppet 5 EOL.
With this we let users know that they can use
Puppet 5 in Ussuri but that we stop officially
supporting it in V.
My hope is that we could also make this a hard
requirement in V so that we can start using the
features that are >= 6.0.0 only.
[1] https://puppet.com/misc/puppet-enterprise-lifecycle
[2] "For example, the PE2018.1 LTS uses Puppet Agent 5.5, so the open
source Puppet Agent 5.5 will receive bug fix and security updates until
May 2020."
[3] https://releases.openstack.org/ussuri/index.html
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