Fix appveyor by no longer dancing around bundler
Fix appveyor by no longer dancing around bundler

also remove ruby 2.3 since we don't use it with 13

Signed-off-by: Thom May <b591b301ff4610f565a21bb050267ffd893cc83c@chef.io>

chef/ohai,higanworks/ohai,mattray/ohai,chef/ohai,jaymzh/ohai,higanworks/ohai,jaymzh/ohai,mattray/ohai