Release puppetserver-ca gem for inclusion in upcoming releases

Merge the 1.x branch of the puppetserver-ca-cli library into its main branch.

• Checkout puppetserver-ca-cli#1.x and pull down the latest updates: git pull <puppet remote> 1.x
• Checkout puppetserver-ca-cli#main and pull down the latest updates for it.
• From the main branch, run git merge --log --no-ff 1.x. This should bring all the new commits from 1.x into the main branch
• Create a PR against the upstream main branch with these changes.

Bump, tag, build, and release the puppetserver-ca gem by running the release pipeline

• for the 1.x branch
• for the main branch

Update to the new gem versions in puppetserver and pe-puppet-server-extensions

• 1.x -> puppetserver 6.x
• main (2.x) -> puppetserver main
• 1.x -> pe-pse 2019.8.x
• main (2.x) -> pe-pse main

We usually do all of this as part of any given ticket for puppetserver-ca work, but since we're making multiple updates, we didn't want to have to do this process a bunch of times in a row.