add 6.2.1 changelog
add 6.2.1 changelog

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