How can I intercept all node request-promise http requests to modify the request options?

I would like to create a "global" request interceptor for request-promise based requests so that I can add an x-request-id header to all outgoing requests. Since the behavior is common across all outgoing requests, I prefer to not have to add this functionality everywhere that I am making a request.

I don't notice such functionality in the library documentation.

via Richard Collette