Add typescript definitions

[orgads]

No description provided.

[vkarpov15]

Sorry for the late review, I had a few questions

[vkarpov15]

What is this declare namespace call about? Shouldn't we just have interface WrapCallbackOptions {} and just use that? And export default function wrapCallback()?

[orgads]

I'm not sure why, but without the namespace I get the following error.

test.ts:1:31 - error TS2497: This module can only be referenced with ECMAScript imports/exports by turning on the 'esModuleInterop' flag and referencing its default export.

1 import * as wrapCallback from '.';

test.ts is:

import * as wrapCallback from '.';

wrapCallback({} as any);