Fix broken options when using '--no-dev'.
Fix broken options when using '--no-dev'.

When using '--no-dev', the command's options where being concatenated like so: '--prefer-dist--no-dev'.
boedah/Robo,burzum/Robo,MAXakaWIZARD/Robo,holyspecter/Robo,BionicClick/Robo,Codegyre/Robo,javigomez/Robo,duxet/Robo,duxet/Robo,Korikulum/Robo,FlowCommunications/Robo,vpassapera/Robo,iMi-digital/iRobo,gabor-udvari/Robo,davidrjonas/Robo,logbon72/Robo,iMi-digital/iRobo,orls/Robo,sprklinginfo/Robo,kostajh/Robo,iMi-digital/iRobo,ahmetgunes/Robo