Update underscore dependency.
Update underscore dependency.

sueyeh/backbone,zhangwei001/backbone,howtolearntocode/backbone,GrimDerp/backbone,hugohua/backbone,sumyfly/backbone,ebsco/backbone,guigrpa/backbone,neocotic/hipbone,ywenjinlin/backbone,timebackzhou/backbone,kuychaco/backbone,ereddate/backbone,vincent1988/backbone,IsoldaJS/isolda-pubsub,dak/backbone,luffy94608/backbone,paulfalgout/backbone,guahanweb/backbone,sunday-star/backbone,linalu1/backbone,anhtholee/backbone,virtru-components/backbone,kuychaco/backbone,mrblueblue/backbone,udhayam/backbone,dak/backbone,jstrimpel/backbone,tgriesser/backbone,jordansexton/backboner,jashkenas/backbone,nikolas/backbone,platinumazure/backbone,linalu1/backbone,FormidableLabs/backbone,Flip120/backbone,udhayam/backbone,anhtholee/backbone,jridgewell/backbone,GerHobbelt/backbone,akre54/backbone,braddunbar/backbone,Krasnyanskiy/backbone,megawac/backbone,jewsroch/backbone,getshuvo/backbone,ywenjinlin/backbone,gougouGet/backbone,darrrk/backbone,paulfalgout/backbone,streamablevideo/backbone,lastjune/backbone,Sachin-Ganesh/backbone,webcoding/backbone,amitpatange88/backbonejs,getshuvo/backbone,fanhc019/backbone,ohbarye/backbone,oss-practice/backbone,liudianpeng/backbone,dcheepurupalli/backbone,npmcomponent/jashkenas-backbone,JesseQin/backbone,neocotic/hipbone,braddunbar/backbone,yawenl/backbone,ohbarye/backbone,GrimDerp/backbone,sumyfly/backbone,wxmfront/backbone,wushuyi/backbone,Diwahars/backbone,premkumargithub/backbone,gougouGet/backbone,Bug2014/backbone,nvoron23/backbone,jasoncbautista/backboneX,ereddate/backbone,wjb12/backbone,jashkenas/backbone,youprofit/backbone,cgvarela/backbone,wangdahoo/backbone,Connectlegendary/backbone,webcoding/backbone,au-phiware/backbone,guahanweb/backbone,gdi2290/backbone,vin100bk/backbone,chyeh727/backbone,wangcan2014/backbone,alekskorolev/lightbones,DannyDelott/backbone,yuhualingfeng/backbone,Akkuma/backbone,ppker/backbone,IsoldaJS/isolda-models,platinumazure/backbone,sueyeh/backbone,tibic/backbone,tzkKrbys/backbone,embarknow/backbone,leimd/backbone,lujocom/backbone,zdespolit/backbone,moccen/backbone,7213/backbone,alekskorolev/lightbones,ridixcr/backbone,ppker/backbone,akre54/backbone,amitpatange88/backbonejs,pandoraui/backbone,jmeas/backbone,zhoufan879/backbone,Krasnyanskiy/backbone,mrblueblue/backbone,Connectlegendary/backbone,moimikey/backbone,7213/backbone,youprofit/backbone,aihua/backbone,gmaclennan/backbone,tadwhitaker/backbone,ntgn81/backbone,embarknow/backbone,elancom/backbone,moccen/backbone,cgvarela/backbone,wangcan2014/backbone,zhoufan879/backbone,trizko/backbone,heroazure/backbone,vincent1988/backbone,yuhualingfeng/backbone,sitexa/backbone,wjb12/backbone,aihua/backbone,sunday-star/backbone,au-phiware/backbone,rashmisajjan/backbone,fanhc019/backbone,howtolearntocode/backbone,FishbaitHarry/backbone,closeio/backbone,honger05/backbone,jungjung917/backbone,ridixcr/backbone,leimd/backbone,tadwhitaker/backbone,luffy94608/backbone,nvoron23/backbone,yawenl/backbone,rashmisajjan/backbone,elancom/backbone,darrrk/backbone,wxmfront/backbone,heroazure/backbone,Niades/backbone,cailong1028/backbone,Sachin-Ganesh/backbone,trizko/backbone,dcheepurupalli/backbone,jmeas/backbone,Niades/backbone,gmaclennan/backbone,cailong1028/backbone,moimikey/backbone,tzkKrbys/backbone,mpapp/backbone,ThiagoGarciaAlves/backbone,ebsco/backbone,Diwahars/backbone,rjz/boneless,jridgewell/backbone,wushuyi/backbone,jungjung917/backbone,jstrimpel/backbone,zdespolit/backbone,timebackzhou/backbone,ntgn81/backbone,zhangwei001/backbone,craigmichaelmartin/backbone,zhangdimelody/backbone,craigmichaelmartin/backbone,feychenie/backbone,huanglp47/backbone,closeio/backbone,vin100bk/backbone,zgl2007dj/backbone,lujocom/backbone,nikolas/backbone,lastjune/backbone,DannyDelott/backbone,feychenie/backbone,honger05/backbone,streamablevideo/backbone,gitterHQ/backbone,JesseQin/backbone,elma-cao/backbone,Flip120/backbone,wangdahoo/backbone,zgl2007dj/backbone,Bug2014/backbone,liudianpeng/backbone,pandoraui/backbone,elma-cao/backbone,ThiagoGarciaAlves/backbone,premkumargithub/backbone,sitexa/backbone,chyeh727/backbone,antoniogarrote/backbone,zhangdimelody/backbone,tibic/backbone,FishbaitHarry/backbone,GerHobbelt/backbone,huanglp47/backbone,jewsroch/backbone