Add missing dep on `should`
Add missing dep on `should`

vedharish/pushd,rs/pushd,rs/pushd,Product-Foundry/pushd,Binarypark/pushd,mattwoberts/pushd,skishore23/Charakapush,avqdev/pushd,futurice/pushd,4screens/pushd,Product-Foundry/pushd,Suninus/pushd,Suninus/pushd,steedos/opush,Yu-Qiu/test-pushd,futurice/pushd,chobiwa/pushd,mattwoberts/pushd,steedos/pushd,peleccom/pushd,chobiwa/pushd,steedos/opush,steedos/opush,vedharish/pushd,4screens/pushd,Binarypark/pushd,skishore23/Charakapush,avqdev/pushd,peleccom/pushd,steedos/pushd,steedos/pushd,Yu-Qiu/test-pushd