Update packages/babylon/README.md [skip ci]
Update packages/babylon/README.md [skip ci]

https://github.com/babel/babel/pull/7292#discussion_r164765384

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