Fix `_.keysIn` test fails in IE9.
Fix `_.keysIn` test fails in IE9.

PhiLhoSoft/lodash,nsamarcos/lodash,reggi/lodash,naoina/lodash,ror/lodash,tquetano-r7/lodash,chrootsu/lodash,steelsojka/lodash,andersonaguiar/lodash,shwaydogg/lodash,ajefremovs/lodash,prawnsalad/lodash,Droogans/lodash,Lottid/lodash,AneesMohammed/lodash,woldie/lodash,boneskull/lodash,andersonaguiar/lodash,lzheng571/lodash,steelsojka/lodash,timruffles/lodash,developer-prosenjit/lodash,joshuaprior/lodash,jshanson7/lodash,woldie/lodash,greyhwndz/lodash,zestia/lodash,naoina/lodash,nbellowe/lodash,phillipalexander/lodash,mjosh954/lodash,mjosh954/lodash,huyinghuan/lodash,AneesMohammed/lodash,mshoaibraja/lodash,woldie/lodash,tgriesser/lodash,transGLUKator/lodash,hafeez-syed/lodash,tejokumar/lodash,prawnsalad/lodash,rtorr/lodash,IveWong/lodash,lekkas/lodash,Lottid/lodash,Lottid/lodash,af7/lodash,xiwc/lodash,transGLUKator/lodash,ajefremovs/lodash,justintung/lodash,imjerrybao/lodash,timruffles/lodash,PhiLhoSoft/lodash,joshuaprior/lodash,Andrey-Pavlov/lodash,AndBicScadMedia/lodash,naoina/lodash,hitesh97/lodash,chrootsu/lodash,shwaydogg/lodash,shwaydogg/lodash,tquetano-r7/lodash,reggi/lodash,ror/lodash,lekkas/lodash,bnicart/lodash,nsamarcos/lodash,benweet/lodash,neouser99/lodash,hafeez-syed/lodash,hafeez-syed/lodash,chrootsu/lodash,greyhwndz/lodash,timruffles/lodash,phillipalexander/lodash,af7/lodash,Andrey-Pavlov/lodash,xiwc/lodash,samuelbeek/lodash,ajefremovs/lodash,af7/lodash,tonyonodi/lodash,neouser99/lodash,PhiLhoSoft/lodash,stewx/lodash,andersonaguiar/lodash,tejokumar/lodash,javiosyc/lodash,nbellowe/lodash,imjerrybao/lodash,tejokumar/lodash,nsamarcos/lodash,enng0227/lodash,IveWong/lodash,bnicart/lodash,IveWong/lodash,justintung/lodash,xiwc/lodash,javiosyc/lodash,neouser99/lodash,Xotic750/lodash,lzheng571/lodash,rtorr/lodash,Droogans/lodash,justintung/lodash,stewx/lodash,javiosyc/lodash,huyinghuan/lodash,hitesh97/lodash,mjosh954/lodash,phillipalexander/lodash,tquetano-r7/lodash,msmorgan/lodash,Droogans/lodash,bnicart/lodash,rlugojr/lodash,msmorgan/lodash,Andrey-Pavlov/lodash,boneskull/lodash,reggi/lodash,zestia/lodash,benweet/lodash,samuelbeek/lodash,developer-prosenjit/lodash,lzheng571/lodash,mshoaibraja/lodash,nbellowe/lodash,transGLUKator/lodash,joshuaprior/lodash,beaugunderson/lodash,stewx/lodash,tgriesser/lodash,developer-prosenjit/lodash,tonyonodi/lodash,AndBicScadMedia/lodash,lekkas/lodash,Xotic750/lodash,AneesMohammed/lodash,mshoaibraja/lodash,beaugunderson/lodash,greyhwndz/lodash,AndBicScadMedia/lodash,huyinghuan/lodash,ror/lodash,enng0227/lodash,benweet/lodash,enng0227/lodash,jshanson7/lodash,imjerrybao/lodash,zestia/lodash,hitesh97/lodash,tgriesser/lodash,Xotic750/lodash,jshanson7/lodash,prawnsalad/lodash,samuelbeek/lodash,rtorr/lodash,rlugojr/lodash