Log Message:
sysutils/ruby-chef-zero: update to 13.1.0

13.1.0 (2017-07-17)

Merged pull requests:

* add the universe endpoint #269 (lamont-granquist)
* Update gemfile dependencies #267 (thommay)
* GET /users?email=ME@MINE.COM -- compare emails ignoring case #266 (srenatus)
* GET /users?email=ME@MINE.COM -- compare emails ignoring case #265 (srenatus)
* implement rfc090 for named nodes endpoint #264 (jeremymv2)
* Add skip-chef-zero-quirks to the defaults in chef-zero #263 (jaymalasinha)
* Add skip-chef-zero-quirks to the defaults in chef-zero #262 (jaymalasinha)
* Ensure that tests that use chef-zero git will work #259 (thommay)