fix plugin names in the readme of babel-plugin-external-helpers-2
fix plugin names in the readme of babel-plugin-external-helpers-2

tikotzky/babel,dekelcohen/babel,Skillupco/babel,kpdecker/babel,dustyjewett/babel-plugin-transform-es2015-modules-commonjs-ember,jeffmo/babel,benjamn/babel,vhf/babel,KunGha/babel,benjamn/babel,jchip/babel,AgentME/babel,drieks/babel,jridgewell/babel,kellyselden/babel,KunGha/babel,zjmiller/babel,fabiomcosta/babel,krasimir/babel,zenparsing/babel,douglasduteil/babel,CrocoDillon/babel,antn/babel,Skillupco/babel,antn/babel,jchip/babel,hzoo/babel,STRML/babel,kellyselden/babel,AgentME/babel,existentialism/babel,douglasduteil/babel,chicoxyzzy/babel,jeffmo/babel,Skillupco/babel,babel/babel,jridgewell/babel,ameyms/babel,claudiopro/babel,hzoo/babel,DmitrySoshnikov/babel,ameyms/babel,maurobringolf/babel,ccschneidr/babel,hzoo/babel,iamstarkov/babel,bcoe/babel,claudiopro/babel,kedromelon/babel,Skillupco/babel,drieks/babel,jeffmo/babel,iamchenxin/babel,guybedford/babel,jridgewell/babel,dekelcohen/babel,mrtrizer/babel,DmitrySoshnikov/babel,jhen0409/babel,STRML/babel,kedromelon/babel,vhf/babel,lxe/babel,iamstarkov/babel,hulkish/babel,existentialism/babel,CrocoDillon/babel,chicoxyzzy/babel,jridgewell/babel,samwgoldman/babel,samwgoldman/babel,Mark-Simulacrum/babel,jhen0409/babel,existentialism/babel,hulkish/babel,kaicataldo/babel,kaicataldo/babel,lxe/babel,maurobringolf/babel,hulkish/babel,shuhei/babel,guybedford/babel,samwgoldman/babel,vadzim/babel,mgcrea/babel,tikotzky/babel,fabiomcosta/babel,garyjN7/babel,vadzim/babel,kaicataldo/babel,mgcrea/babel,zertosh/babel,drieks/babel,Industrial/babel,kpdecker/babel,zjmiller/babel,shuhei/babel,PolymerLabs/babel,hzoo/babel,bcoe/babel,kassens/babel,zertosh/babel,iamchenxin/babel,mrtrizer/babel,babel/babel,mgcrea/babel,zenparsing/babel,rmacklin/babel,Industrial/babel,ccschneidr/babel,chicoxyzzy/babel,PolymerLabs/babel,claudiopro/babel,kaicataldo/babel,PolymerLabs/babel,kellyselden/babel,maurobringolf/babel,Mark-Simulacrum/babel,Mark-Simulacrum/babel,kedromelon/babel,shuhei/babel,garyjN7/babel,guybedford/babel,chicoxyzzy/babel,kassens/babel,rmacklin/babel,babel/babel,babel/babel,kellyselden/babel,krasimir/babel,hulkish/babel,iamchenxin/babel,douglasduteil/babel