message: [client] Send faucet requests as POST
  Summary: This changes state, it should be POST.
  Test Plan: Tested minting against production testnet.
diff: @@ -881,7 +881,8 @@ impl ClientProxy {
  )
  .parse::<hyper::Uri>()?;
  - let response = runtime.block_on(client.get(url))?;
  + let request = hyper::Request::post(url).body(hyper::Body::empty())?;
  + let response = runtime.block_on(client.request(request))?;
  let status_code = response.status();
  let body = response.into_body().concat2().wait()?;
  let raw_data = std::str::from_utf8(&body)?;
  