chore(travis): test against node "4", not "4.1"
chore(travis): test against node "4", not "4.1"

Node is now adhering to semver & receiving minor updates pretty often;
only the latest one is supported upstream.

When Node 4.2.0 comes out Protractor should be tested on it instead of 4.1.1.

fancyhejianyang/protractor-operation,xaka/protractor,angular/protractor,lmacneil/protractor,xaka/protractor,xaka/protractor,sjelin/protractor,juliemr/protractor,juliemr/protractor,manoj9788/protractor,manoj9788/protractor,paraplexed/protractor,cnishina/protractor,jlin412/protractor,onshape/protractor,igniteram/protractor,modernfidelity/protractor,sirwalt/protractor,xaka/protractor,telefonicaid/protractor,marleitao/protractor,karthiktv006/protractor,igniteram/protractor,hankduan/protractor,mgiambalvo/protractor,lmacneil/protractor,sjelin/protractor,hankduan/protractor,sirwalt/protractor,jcapozzi/protractor,joshmgrant/protractor,panuhorsmalahti/protractor,BernardoSilva/protractor,mgiambalvo/protractor,Droogans/protractor,sirwalt/protractor,panuhorsmalahti/protractor,Droogans/protractor,angular/protractor,paraplexed/protractor,onshape/protractor,manoj9788/protractor,sjelin/protractor,Everworks/protractor,jlin412/protractor,GistIcon/protractor,GistIcon/protractor,NickTomlin/protractor,Droogans/protractor,telefonicaid/protractor,angular/protractor,BernardoSilva/protractor,jcapozzi/protractor,igniteram/protractor,telefonicaid/protractor,vliloia/protractor,fancyhejianyang/protractor-operation,Everworks/protractor,panuhorsmalahti/protractor,mgiambalvo/protractor,jcapozzi/protractor,mgiambalvo/protractor,Everworks/protractor,cnishina/protractor,NickTomlin/protractor,onshape/protractor,fancyhejianyang/protractor-operation,onshape/protractor,fancyhejianyang/protractor-operation,Everworks/protractor,BernardoSilva/protractor,sjelin/protractor,jlin412/protractor,juliemr/protractor,paraplexed/protractor,marleitao/protractor,NickTomlin/protractor,jlin412/protractor,cnishina/protractor,karthiktv006/protractor,modernfidelity/protractor,joshmgrant/protractor,GistIcon/protractor,juliemr/protractor,igniteram/protractor,NickTomlin/protractor,hankduan/protractor,marleitao/protractor,lmacneil/protractor,modernfidelity/protractor,sirwalt/protractor,vliloia/protractor,jcapozzi/protractor,vliloia/protractor,joshmgrant/protractor,angular/protractor,manoj9788/protractor,cnishina/protractor,karthiktv006/protractor,marleitao/protractor