Support for “export default from” and “export ns from” proposals

[calebmer]

Is it on the TypeScript roadmap to support the export default from and export namespace from proposals? This makes working with default exports much easier. Currently this needs to be done to export a bunch of defaults as named exports:

import a from 'a'
import b from 'b'
import c from 'c'

export {
  a,
  b,
  c,
}

By implementing these proposals the above goes to:

export a from 'a'
export b from 'b'
export c from 'c'

These proposals make import/export semantics symmetrical.

[mhegazy]

should be covered by the proposal in #4813