Typings does not work with `throat(Promise)` syntax

[unional]

// Argument of type 'PromiseConstructor' is not assignable to parameter of type 'number'.
const throat = require('throat')(Promise);

cc/ @blakeembrey as typings/core is using this.

[blakeembrey]

Ah, that must be where this project broke Typings. Thanks for investigating that. @ForbesLindesay I think we just need an additional overload for promise passing.

[unional]

This is one of the issues I encounter when I try to fix the typings/core.
I was trying to update some typings and use @types when I encounter this. When this is fix I can spend some time to complete that on https://github.com/typings/core/tree/to-at-types