add 6.2.2 changelog
add 6.2.2 changelog

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