:tls_alert, 'handshake failure' on Poison

[overallduka]

Well, after workaround fixes #4 and #3 i start receiving this error of poison, after some search i found this: edgurgel/httpoison#164 (comment) , so i update Client.post function to:

HTTPoison.post(request.full_url, request.body, request.headers, hackney: [pool: :shopify], ssl: [{:versions, [:'tlsv1.2']}])```

and works fine =).

Note to author: Im sorry report all this bugs but i really like your shopify plugin, is the best in Elixir language, so i trying to help because im using happy =). Good work on this.