Use bundle exec in Travis task.
Use bundle exec in Travis task.

InspireNL/bootsy,hasanloo/bootsy,volmer/bootsy,ethomm/bootsy-bootstrap-alpha,max-si-m/bootsy,timrogers/bootsy,hasanloo/bootsy,hasanloo/bootsy,timrogers/bootsy,max-si-m/bootsy,jwoertink/bootsy,volmer/bootsy,shilpi230/bootsy,timrogers/bootsy,shilpi230/bootsy,ethomm/bootsy-bootstrap-alpha,varun-raj/bootsy,varun-raj/bootsy,InspireNL/bootsy,votio/bootsy,jwoertink/bootsy,votio/bootsy,max-si-m/bootsy,jwoertink/bootsy,ethomm/bootsy-bootstrap-alpha,InspireNL/bootsy,volmer/bootsy,varun-raj/bootsy,votio/bootsy,shilpi230/bootsy