Fix compatability with 0.24.0

[gsbernstein]

Change Operation to Operation.Data in two places, and update the version in the podspec

I think this is the change that broke it, or simultaneous with it.

I know you said you're deprecating this, but I don't know how to migrate to use the new equivalent features, so for now we're maintaining it this way, and I thought other people might be interested. If you know of a migration guide I'd love to see it so we can remove Alamofire in some places!