fix for bools doubling up, passes the parse test again, others fail
fix for bools doubling up, passes the parse test again, others fail

raine/yargs,jvdm/yargs,rstacruz/yargs,dkoleary88/yargs,geophree/yargs,bcoe/yargs,tepez/yargs,ammeep/yargs,yargs/yargs,yargs/yargs,elas7/yargs,LoicMahieu/yargs,yargs/yargs,nexdrew/yargs,sgentle/yargs,ggoodman/yargs,tepez/yargs,oti/yargs,bcoe/yargs,Teino1978-Corp/Teino1978-Corp-node-optimist,geophree/yargs,ChristianMurphy/yargs,ammeep/yargs,nexdrew/yargs,elas7/yargs,jean-emmanuel/yargs,zkat/yargs,substack/node-optimist,etiktin/yargs,dkoleary88/yargs,jean-emmanuel/yargs