Ensure yard installs on travis.
Ensure yard installs on travis.

On travis, bundler runs "--without extras".
ihassin/vcr,asymmetric/vcr,allyapp/vcr,ZmagoD/vcr,cemo/vcr,mcfiredrill/vcr,chriswoodrich/vcr,Shopify/vcr,intfrr/vcr,mcfiredrill/vcr,chriswoodrich/vcr,nishanbose/vcr,irfanah/vcr,ZmagoD/vcr,davidbebb/vcr,cemo/vcr,myronmarston/vcr,myronmarston/vcr,nishanbose/vcr,intfrr/vcr,allyapp/vcr,davidbebb/vcr,asymmetric/vcr,ihassin/vcr,Shopify/vcr,irfanah/vcr