sort doesn't infer in simple case

[wclr]

1. I believe sort should always return type of passed array:
2. Be able to check typings in inner comparator

    type A = { x: number }    
    const list: A[] = [{ x: 1 }, {x: 2}]
    const sorted = R.sort(R.ascend(R.prop('y')), list)

[ikatyang]

Unfortunately this is a TS limitation, see microsoft/TypeScript#16914 for more info.