Since Faraday doesn't support the `options` request as a first class
HTTP method (see lostisland/faraday#305) we need to use the `run_request`
method instead of the `options` one.

I decided to raise errors since it was the only thing I could think of
to test without having false possitives, since `assert true` won't fail
if the test is not passed.

* Rename `handle_error` for `handle_response`
* Remove `define_method` for the `options!` method.