Handle 404s without crashing in fetch-gem-version
Handle 404s without crashing in fetch-gem-version

perobertson/shipit-engine,perobertson/shipit-engine,Shopify/shipit-engine,ershad/shipit-engine,ershad/shipit-engine,Shopify/shipit-engine,ershad/shipit-engine,ershad/shipit-engine,Shopify/shipit-engine,Shopify/shipit-engine,perobertson/shipit-engine,Shopify/shipit-engine,perobertson/shipit-engine,perobertson/shipit-engine,ershad/shipit-engine