Bump rubocop in Gemfile to -> 0.18, due to https://github.com/bbatsov/rubocop/pull/763.
Relax the pessimistic version of Chef with the spermy operator.
Bump up chefspec to ~> 3.2.
Modify the 'template' skel Gemfile with the previous version changes.
Merge pull request #4 from flaccid/Gemfile_updates

Bump rubocop in Gemfile to -> 0.18, due to https://github.com/bbatsov/ru...