Add support for /redeem-requests endpoint

[rlajous]

Description

The POAP API offers a /redeem-requests endpoint that is currently not supported in the POAP.js library. This endpoint is used to request more codes for one of the following redeem methods: QR Code, Secret Website, or Secret Word.

Expected Behavior

A new method should be added to the library to allow users to interact with the /redeem-requests endpoint. This would involve sending a POST request to the endpoint and handling the response.

Current Behavior

Currently, the library does not provide support for interacting with the /redeem-requests endpoint of the POAP API.

Possible Solution

A new method could be added to the library which takes the necessary parameters for a request to the /redeem-requests endpoint, sends the POST request, and handles the response.

Context

This feature would be useful for users who wish to request more codes for one of the redeem methods supported by the POAP API.