Import new upstream release 2.0.0
A new upstream release has been available for some time. The package on which I'm working on, puppet-development-kit, requires a more recent version of ruby-hitimes, so I've imported this latest upstream release.
Gitlab won't let me create a merge request that spans multiple branches at once but this MR should also come with the upstream
branch from my repository, and the upstream/2.0.0
tag that's placed on that branch.