Update babel-generator's README (#5517) [skip ci]
Update babel-generator's README (#5517) [skip ci]


maurobringolf/babel,kellyselden/babel,kaicataldo/babel,Skillupco/babel,kaicataldo/babel,babel/babel,jridgewell/babel,kellyselden/babel,STRML/babel,chicoxyzzy/babel,hulkish/babel,kaicataldo/babel,maurobringolf/babel,hzoo/babel,vadzim/babel,claudiopro/babel,kedromelon/babel,claudiopro/babel,babel/babel,kedromelon/babel,babel/babel,samwgoldman/babel,hzoo/babel,hulkish/babel,Skillupco/babel,existentialism/babel,samwgoldman/babel,shuhei/babel,existentialism/babel,chicoxyzzy/babel,chicoxyzzy/babel,jridgewell/babel,chicoxyzzy/babel,hulkish/babel,Skillupco/babel,hulkish/babel,shuhei/babel,PolymerLabs/babel,kedromelon/babel,jridgewell/babel,hzoo/babel,existentialism/babel,Skillupco/babel,babel/babel,vadzim/babel,maurobringolf/babel,STRML/babel,shuhei/babel,hzoo/babel,PolymerLabs/babel,kellyselden/babel,samwgoldman/babel,kaicataldo/babel,kellyselden/babel,guybedford/babel,jridgewell/babel,guybedford/babel,PolymerLabs/babel,claudiopro/babel,guybedford/babel