solved faraday deprecation message

[benitoprijs]

When using this library I've got the following messages:

WARNING: `Faraday::Connection#basic_auth` is deprecated; it will be removed in version 2.0.
While initializing your connection, use `#request(:basic_auth, ...)` instead.
See https://lostisland.github.io/faraday/middleware/authentication for more usage info.

Solved this by initializing the Faraday connection the new way...