Monkeypatch to support `request: { preserve_raw: true }`
Monkeypatch to support `request: { preserve_raw: true }`

Faraday 0.9 doesn't support custom keys in RequestOptions. However, a
faraday_middleware feature allowed people to set this option with
earlier versions of Faraday.

For now, a monkeypatch is necessary to retain this compatibility.

pferdefleisch/faraday_middleware,tinfoil/faraday_middleware,lostisland/faraday_middleware,lostisland/faraday_middleware,ShaneWilton/faraday_middleware,ShaneWilton/faraday_middleware,tinfoil/faraday_middleware,h4ck3rm1k3/faraday_middleware,pferdefleisch/faraday_middleware,austinrfnd/faraday_middleware,h4ck3rm1k3/faraday_middleware,austinrfnd/faraday_middleware