try to brew install yarn on travis
try to brew install yarn on travis

marijanlekic/cottontail-frontend,rabix/cottontail-frontend,rabix/cottontail-frontend,rabix/cottontail-frontend,marijanlekic/cottontail-frontend,marijanlekic/cottontail-frontend,rabix/composer,rabix/composer,rabix/composer,rabix/cottontail-frontend