Add Result as an explicit dependency in SwiftPM
Add Result as an explicit dependency in SwiftPM

As noticed in #957
Moya/Moya,calt/Moya,calt/Moya,justinmakaila/Moya,Moya/Moya,Moya/Moya,justinmakaila/Moya,ashfurrow/Moya,justinmakaila/Moya,calt/Moya,ashfurrow/Moya