Add RxSwift and RxCocoa dependency to SPM

Author: devxoul

Package.swift

@@ -9,10 +9,10 @@ let package = Package(
     .library(name: "Differentiator", targets: ["Differentiator"]),
   ],
   dependencies: [
-    .package(url: "https://github.com/ReactiveX/RxSwift.git", "4.0.0" ..< "5.0.0"),
+    .package(url: "https://github.com/ReactiveX/RxSwift.git", .upToNextMajor(from: "4.0.0")),
   ],
   targets: [
-    .target(name: "RxDataSources", dependencies: ["Differentiator"]),
+    .target(name: "RxDataSources", dependencies: ["Differentiator", "RxSwift", "RxCocoa"]),
     .target(name: "Differentiator"),
     .testTarget(name: "RxDataSourcesTests", dependencies: ["RxDataSources"]),
   ]