Add tests for `_.pluck`, `_.findWhere`, and `_.where` for their `key` or `source` arguments.
Add tests for `_.pluck`, `_.findWhere`, and `_.where` for their `key` or `source` arguments.

leolin1229/lodash,Lottid/lodash,lzheng571/lodash,jzning-martian/lodash,mshoaibraja/lodash,transGLUKator/lodash,samuelbeek/lodash,Andrey-Pavlov/lodash,justintung/lodash,krahman/lodash,reggi/lodash,hafeez-syed/lodash,AneesMohammed/lodash,codydaig/lodash,codydaig/lodash,woldie/lodash,polarbird/lodash,leolin1229/lodash,enng0227/lodash,Andrey-Pavlov/lodash,BernhardRode/lodash,mshoaibraja/lodash,lekkas/lodash,enng0227/lodash,imjerrybao/lodash,lekoaf/lodash,ajefremovs/lodash,krrg/lodash,codydaig/lodash,r14r-work/fork_javascript_lodash,IveWong/lodash,rtorr/lodash,xiwc/lodash,greyhwndz/lodash,studiowangfei/lodash,krrg/lodash,BernhardRode/lodash,krahman/lodash,timruffles/lodash,tonyonodi/lodash,phillipalexander/lodash,steelsojka/lodash,imjerrybao/lodash,prawnsalad/lodash,Moykn/lodash,nbellowe/lodash,lzheng571/lodash,naoina/lodash,rtorr/lodash,tquetano-r7/lodash,timruffles/lodash,felixshu/lodash,jshanson7/lodash,AndBicScadMedia/lodash,af7/lodash,BernhardRode/lodash,tgriesser/lodash,reggi/lodash,justintung/lodash,Lottid/lodash,youprofit/lodash,Xotic750/lodash,samuelbeek/lodash,dgoncalves1/lodash,felixshu/lodash,ror/lodash,boneskull/lodash,julianocomg/lodash,gutenye/lodash,phillipalexander/lodash,r14r/fork_javascript_lodash,javiosyc/lodash,joshuaprior/lodash,Moykn/lodash,polarbird/lodash,jasnell/lodash,jshanson7/lodash,shwaydogg/lodash,xixilive/lodash,dgoncalves1/lodash,timruffles/lodash,r14r-work/fork_javascript_lodash,julianocomg/lodash,transGLUKator/lodash,IveWong/lodash,leolin1229/lodash,af7/lodash,naoina/lodash,ricardohbin/lodash,tquetano-r7/lodash,zestia/lodash,gutenye/lodash,andersonaguiar/lodash,mjosh954/lodash,nbellowe/lodash,msmorgan/lodash,neouser99/lodash,nbellowe/lodash,imjerrybao/lodash,jzning-martian/lodash,hitesh97/lodash,javiosyc/lodash,therebelbeta/lodash,MaxPRafferty/lodash,ajefremovs/lodash,samuelbeek/lodash,joshuaprior/lodash,javiosyc/lodash,msmorgan/lodash,tejokumar/lodash,shwaydogg/lodash,bnicart/lodash,ricardohbin/lodash,xixilive/lodash,huyinghuan/lodash,polarbird/lodash,lzheng571/lodash,benweet/lodash,mshoaibraja/lodash,rlugojr/lodash,Lottid/lodash,prawnsalad/lodash,julianocomg/lodash,nsamarcos/lodash,ror/lodash,xixilive/lodash,phillipalexander/lodash,Droogans/lodash,huyinghuan/lodash,lekoaf/lodash,rtorr/lodash,hafeez-syed/lodash,huyinghuan/lodash,stewx/lodash,shwaydogg/lodash,r14r-work/fork_javascript_lodash,beaugunderson/lodash,tejokumar/lodash,jasnell/lodash,chrootsu/lodash,ror/lodash,Droogans/lodash,studiowangfei/lodash,Andrey-Pavlov/lodash,youprofit/lodash,nsamarcos/lodash,stewx/lodash,Moykn/lodash,AneesMohammed/lodash,Jaspersoft/lodash,zestia/lodash,gutenye/lodash,r14r/fork_javascript_lodash,therebelbeta/lodash,ricardohbin/lodash,lekkas/lodash,studiowangfei/lodash,AndBicScadMedia/lodash,krrg/lodash,youprofit/lodash,therebelbeta/lodash,beaugunderson/lodash,Jaspersoft/lodash,benweet/lodash,zhangguangyong/lodash,greyhwndz/lodash,Xotic750/lodash,krahman/lodash,bnicart/lodash,enng0227/lodash,felixshu/lodash,tonyonodi/lodash,stewx/lodash,andersonaguiar/lodash,dgoncalves1/lodash,lekoaf/lodash,zestia/lodash,tgriesser/lodash,chrootsu/lodash,developer-prosenjit/lodash,Xotic750/lodash,PhiLhoSoft/lodash,xiwc/lodash,benweet/lodash,AndBicScadMedia/lodash,tejokumar/lodash,PhiLhoSoft/lodash,tquetano-r7/lodash,jasnell/lodash,naoina/lodash,gdi2290/lodash,jacwright/lodash,zhangguangyong/lodash,xiwc/lodash,mjosh954/lodash,Jaspersoft/lodash,woldie/lodash,zhangguangyong/lodash,developer-prosenjit/lodash,mjosh954/lodash,steelsojka/lodash,schnerd/lodash,andersonaguiar/lodash,hitesh97/lodash,reggi/lodash,schnerd/lodash,gdi2290/lodash,boneskull/lodash,nsamarcos/lodash,joshuaprior/lodash,prawnsalad/lodash,tgriesser/lodash,woldie/lodash,Droogans/lodash,rlugojr/lodash,ajefremovs/lodash,jacwright/lodash,IveWong/lodash,transGLUKator/lodash,neouser99/lodash,PhiLhoSoft/lodash,justintung/lodash,jshanson7/lodash,MaxPRafferty/lodash,hafeez-syed/lodash,hitesh97/lodash,neouser99/lodash,greyhwndz/lodash,developer-prosenjit/lodash,jacwright/lodash,bnicart/lodash,af7/lodash,chrootsu/lodash,r14r/fork_javascript_lodash,jzning-martian/lodash,AneesMohammed/lodash,schnerd/lodash,MaxPRafferty/lodash,lekkas/lodash