support reserved let in node v5.11.0
support reserved let in node v5.11.0

ajijohn/brainprinter,awarn/bitcoins-trader,devneel/spitsomebars,ReadingPlus/flog,IsaacHardy/HOCO-FF-APP,peterblazejewicz/hackathon-starter,dborncamp/shuttles,ak-zul/hackathon-starter,colleenDunlap/Lake-Map,EvelynSun/fcc-vote1,ajijohn/brainprinter,hect1c/front-end-test,hect1c/front-end-test,mostley/backstab,gurneyman/riToolkit,CAYdenberg/wikode,quazar11/portfolio,LucienBrule/carpool,peterblazejewicz/hackathon-starter,CahalKearney/node-boilerplate,LucienBrule/carpool,peterblazejewicz/hackathon-starter,EvelynSun/fcc-vote1,pvijeh/node-express-mongo-api,bowdenk7/express-typescript-starter,quazar11/portfolio,colleenDunlap/Lake-Map,shareonbazaar/bazaar,erood/creepy_ghost,shareonbazaar/bazaar,sahat/hackathon-starter,Carlosreyesk/boards-api,dafyddPrys/contingency,awarn/bitcoins-trader,colleenDunlap/PlayingOnInternet,Yixuan-Angela/hackathon-starter,niallobrien/hackathon-starter-plus,bowdenk7/express-typescript-starter,wfpc92/cleansuit-backend,ajijohn/brainprinter,colleenDunlap/Lake-Map,mostley/backstab,dborncamp/shuttles,HappyGenes/HappyGenes,ericmreid/pingypong,teogenesmoura/SoftwareEng12016,awarn/cashier-analytics,mrwolfyu/meteo-bbb,sahat/hackathon-starter,vymarkov/hackathon-starter,tendermario/binners-project,vymarkov/hackathon-starter,crystalrood/piggie,devneel/spitsomebars,colleenDunlap/PlayingOnInternet,crystalrood/piggie,erood/weight_tracker_app,HappyGenes/HappyGenes,bowdenk7/express-typescript-starter,niallobrien/hackathon-starter-plus,OperationSpark/Hackathon-Angel,erood/weight_tracker_app,colleenDunlap/PlayingOnInternet,erood/creepy_ghost,mrwolfyu/meteo-bbb,ahng1996/balloon-fight,dafyddPrys/contingency,IsaacHardy/HOCO-FF-APP,crystalrood/piggie,ajijohn/brainprinter,CahalKearney/node-boilerplate,ReadingPlus/flog,ericmreid/pingypong,CAYdenberg/wikode,awarn/cashier-analytics,ak-zul/hackathon-starter,teogenesmoura/SoftwareEng12016,stenio123/ai-hackathon,cwesno/app_for_us,Carlosreyesk/boards-api,shareonbazaar/bazaar,sahat/hackathon-starter,Yixuan-Angela/hackathon-starter,JessedeGit/vegtable,pvijeh/node-express-mongo-api,wfpc92/cleansuit-backend,cwesno/app_for_us,gurneyman/riToolkit,tendermario/binners-project,JessedeGit/vegtable,stenio123/ai-hackathon,OperationSpark/Hackathon-Angel,ahng1996/balloon-fight