Avoid mutating the passed-in options for babel-register (#6542)
Avoid mutating the passed-in options for babel-register (#6542)


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