Add support for follow redirect

[alee13-chwy]

Since 301 and 302 are considered as successful, it misses error when the final Location is an error.

Using contentInspector(result) gives me access to result.headers.location but not make a new request by setting options.path = result.headers.location

[alexfernandez]

Sorry for the inexcusable delay. I imagine it should be easier to make a request to the final location. In any case, if you propose a patch I will gladly accept it.

[JendaPerl]

I'm not sure how to make it optional, but I installed follow-redirects (npm install follow-redirects) and replaced

import * as http from 'http'
import * as https from 'https'

by

import pkg from 'follow-redirects';
const {http,https} = pkg;

in httpClient.js.