Add sourceType as a new mandatory option
Add sourceType as a new mandatory option

Summary:
The `sourceType` option is a new mandatory option for Babel which determines whether to parse the file with the module or script goal. The value "disambiguous" determines this state by parsing.

See https://github.com/babel/babel/pull/7417

Reviewed By: mjesun

Differential Revision: D7685610

fbshipit-source-id: 3958c5ad396592bb1d790e2df4ce315737421a2f

hoangpham95/react-native,myntra/react-native,arthuralee/react-native,janicduplessis/react-native,janicduplessis/react-native,hoangpham95/react-native,javache/react-native,pandiaraj44/react-native,myntra/react-native,javache/react-native,hammerandchisel/react-native,myntra/react-native,pandiaraj44/react-native,hammerandchisel/react-native,hoangpham95/react-native,exponentjs/react-native,myntra/react-native,pandiaraj44/react-native,facebook/react-native,facebook/react-native,facebook/react-native,javache/react-native,myntra/react-native,janicduplessis/react-native,exponentjs/react-native,exponent/react-native,exponent/react-native,janicduplessis/react-native,hammerandchisel/react-native,myntra/react-native,hoangpham95/react-native,exponentjs/react-native,pandiaraj44/react-native,arthuralee/react-native,myntra/react-native,janicduplessis/react-native,exponent/react-native,facebook/react-native,arthuralee/react-native,exponent/react-native,pandiaraj44/react-native,exponent/react-native,hammerandchisel/react-native,hammerandchisel/react-native,janicduplessis/react-native,hoangpham95/react-native,hoangpham95/react-native,javache/react-native,exponentjs/react-native,javache/react-native,hoangpham95/react-native,hammerandchisel/react-native,pandiaraj44/react-native,hammerandchisel/react-native,javache/react-native,exponent/react-native,facebook/react-native,myntra/react-native,pandiaraj44/react-native,janicduplessis/react-native,hoangpham95/react-native,arthuralee/react-native,janicduplessis/react-native,myntra/react-native,facebook/react-native,exponentjs/react-native,javache/react-native,pandiaraj44/react-native,facebook/react-native,exponentjs/react-native,exponent/react-native,exponentjs/react-native,hammerandchisel/react-native,javache/react-native,exponent/react-native,arthuralee/react-native,exponentjs/react-native,facebook/react-native,javache/react-native,facebook/react-native