Bump minimal puppet version to 6.0.0 in metadata.json
Bump minimal puppet version to 6.0.0 in metadata.json

buzzdeee/puppetlabs-postgresql,puppetlabs/puppetlabs-postgresql,puppetlabs/puppetlabs-postgresql,puppetlabs/puppetlabs-postgresql,buzzdeee/puppetlabs-postgresql,buzzdeee/puppetlabs-postgresql