Add `_.invert` and `_.pairs`.
Add `_.invert` and `_.pairs`.


Former-commit-id: b265ed3f148e5e951b8d061107bb376e0b2e651e
xixilive/lodash,tejokumar/lodash,hafeez-syed/lodash,imjerrybao/lodash,r14r/fork_javascript_lodash,nbellowe/lodash,stewx/lodash,Andrey-Pavlov/lodash,AndBicScadMedia/lodash,jacwright/lodash,felixshu/lodash,lekoaf/lodash,woldie/lodash,lekkas/lodash,therebelbeta/lodash,tgriesser/lodash,AneesMohammed/lodash,chrootsu/lodash,youprofit/lodash,jshanson7/lodash,timruffles/lodash,jzning-martian/lodash,PhiLhoSoft/lodash,r14r/fork_javascript_lodash,reggi/lodash,dgoncalves1/lodash,lzheng571/lodash,krahman/lodash,lzheng571/lodash,therebelbeta/lodash,jasnell/lodash,schnerd/lodash,AndBicScadMedia/lodash,r14r-work/fork_javascript_lodash,Jaspersoft/lodash,reggi/lodash,mshoaibraja/lodash,youprofit/lodash,javiosyc/lodash,jshanson7/lodash,developer-prosenjit/lodash,stewx/lodash,leolin1229/lodash,rtorr/lodash,shwaydogg/lodash,steelsojka/lodash,tonyonodi/lodash,leolin1229/lodash,lekkas/lodash,r14r-work/fork_javascript_lodash,ror/lodash,benweet/lodash,msmorgan/lodash,AndBicScadMedia/lodash,hafeez-syed/lodash,jzning-martian/lodash,naoina/lodash,felixshu/lodash,gdi2290/lodash,hitesh97/lodash,Moykn/lodash,naoina/lodash,stewx/lodash,IveWong/lodash,bnicart/lodash,imjerrybao/lodash,BernhardRode/lodash,schnerd/lodash,zhangguangyong/lodash,julianocomg/lodash,hitesh97/lodash,MaxPRafferty/lodash,ajefremovs/lodash,Lottid/lodash,gutenye/lodash,steelsojka/lodash,justintung/lodash,polarbird/lodash,gutenye/lodash,MaxPRafferty/lodash,xiwc/lodash,joshuaprior/lodash,neouser99/lodash,Xotic750/lodash,PhiLhoSoft/lodash,zestia/lodash,bnicart/lodash,nsamarcos/lodash,therebelbeta/lodash,ajefremovs/lodash,dgoncalves1/lodash,rtorr/lodash,shwaydogg/lodash,joshuaprior/lodash,r14r-work/fork_javascript_lodash,gutenye/lodash,tejokumar/lodash,af7/lodash,lekoaf/lodash,dgoncalves1/lodash,Xotic750/lodash,lzheng571/lodash,BernhardRode/lodash,nbellowe/lodash,AneesMohammed/lodash,rlugojr/lodash,Lottid/lodash,mjosh954/lodash,greyhwndz/lodash,Jaspersoft/lodash,codydaig/lodash,prawnsalad/lodash,neouser99/lodash,andersonaguiar/lodash,codydaig/lodash,Moykn/lodash,reggi/lodash,jasnell/lodash,hitesh97/lodash,Andrey-Pavlov/lodash,ricardohbin/lodash,msmorgan/lodash,joshuaprior/lodash,developer-prosenjit/lodash,jzning-martian/lodash,codydaig/lodash,Droogans/lodash,mjosh954/lodash,developer-prosenjit/lodash,enng0227/lodash,timruffles/lodash,tgriesser/lodash,r14r/fork_javascript_lodash,xixilive/lodash,transGLUKator/lodash,IveWong/lodash,Droogans/lodash,xiwc/lodash,justintung/lodash,Xotic750/lodash,krrg/lodash,bnicart/lodash,ricardohbin/lodash,Lottid/lodash,javiosyc/lodash,tejokumar/lodash,samuelbeek/lodash,jacwright/lodash,chrootsu/lodash,julianocomg/lodash,beaugunderson/lodash,huyinghuan/lodash,julianocomg/lodash,neouser99/lodash,MaxPRafferty/lodash,Droogans/lodash,nsamarcos/lodash,tgriesser/lodash,naoina/lodash,boneskull/lodash,zestia/lodash,studiowangfei/lodash,gdi2290/lodash,ricardohbin/lodash,zestia/lodash,Jaspersoft/lodash,zhangguangyong/lodash,shwaydogg/lodash,greyhwndz/lodash,nsamarcos/lodash,BernhardRode/lodash,krrg/lodash,phillipalexander/lodash,prawnsalad/lodash,rtorr/lodash,af7/lodash,rlugojr/lodash,polarbird/lodash,beaugunderson/lodash,ror/lodash,tquetano-r7/lodash,xixilive/lodash,phillipalexander/lodash,nbellowe/lodash,tquetano-r7/lodash,IveWong/lodash,transGLUKator/lodash,jasnell/lodash,boneskull/lodash,felixshu/lodash,hafeez-syed/lodash,youprofit/lodash,imjerrybao/lodash,lekoaf/lodash,jacwright/lodash,krahman/lodash,enng0227/lodash,javiosyc/lodash,Moykn/lodash,polarbird/lodash,Andrey-Pavlov/lodash,studiowangfei/lodash,xiwc/lodash,samuelbeek/lodash,enng0227/lodash,studiowangfei/lodash,woldie/lodash,tquetano-r7/lodash,greyhwndz/lodash,leolin1229/lodash,af7/lodash,krrg/lodash,ror/lodash,justintung/lodash,mshoaibraja/lodash,mshoaibraja/lodash,jshanson7/lodash,benweet/lodash,andersonaguiar/lodash,samuelbeek/lodash,woldie/lodash,schnerd/lodash,benweet/lodash,phillipalexander/lodash,transGLUKator/lodash,krahman/lodash,andersonaguiar/lodash,tonyonodi/lodash,ajefremovs/lodash,PhiLhoSoft/lodash,prawnsalad/lodash,zhangguangyong/lodash,AneesMohammed/lodash,mjosh954/lodash,lekkas/lodash,huyinghuan/lodash,huyinghuan/lodash,chrootsu/lodash,timruffles/lodash