Adding Axios like Typescript support

Testing this package with **Typescript**, we are getting this:
`import axios, { AxiosInstance, AxiosRequestConfig } from 'redaxios';`

> Module '"redaxios"' has no exported member 'AxiosInstance'. Did you mean to use 'import AxiosInstance from "redaxios"' instead?

As far as we understand, there is a simple typing support, so, we don't understand why this package does not include the standard **axios** types.

Thank you