Add RxCocoa

Author: galbernator

Package.swift

@@ -20,7 +20,7 @@ let package = Package(
         // Targets can depend on other targets in this package, and on products in packages which this package depends on.
         .target(
             name: "ObservableNetworking",
-            dependencies: ["RxSwift"]),
+            dependencies: ["RxSwift", "RxCocoa"]),
         .testTarget(
             name: "ObservableNetworkingTests",
             dependencies: ["ObservableNetworking"]),