Auto merge of #16 - habitat-sh:nls/rubygems-update, r=fnichol
Auto merge of #16 - habitat-sh:nls/rubygems-update, r=fnichol

Updates to ruby plan

* Update to latest rubygems when building
* Add a `do_check`
* Add a `pkg_description`
* Make license use SPDX format
* ShellCheck-suggested fixes

Signed-off-by: Nathan L Smith <2b5c240e6abd88e71ffc225b0459016e4cba9bda@chef.io>

be-plans/be,be-plans/be,be-plans/be,be-plans/be