Httpx dependency needs an update

[Anas-Nabulsi]

There's a known problem for windows users that is only solved in later versions of httpx.
For reference: HoneyryderChuck/httpx#19

I'm running into the same issue when running the application. I confirm the issue is solved after I forked the repo and updated the dependency myself.

[obahareth]

Thanks @Anas-Nabulsi. We actually need to support older Ruby versions, the latest versions of HTTPX do not support them. Will look into doing this with Net::HTTP or Faraday instead for now.