Ruby 2.7+ required but Puppet 6 doesn't run on Ruby 2.7

[ekohl]

AFAIK Puppet 6 doesn't run on Ruby 2.7. I'd expect either Ruby 2.5 + Puppet 6 or Ruby 2.7 + Puppet 7. However, given Puppet 6 is not yet EOL I'd prefer to have Ruby 2.5 as the lower bound.

Originally posted by @ekohl in #364 (comment)

[chelnak]

Yeah you are right..

Lets get that fixed.. hopefully there are no major dependency issues.

[chelnak]

@ekohl I think GH-372 fixes this