Add RxSwift

Package.resolved

@@ -28,6 +28,15 @@
           "version": "1.0.0"
         }
       },
+      {
+        "package": "RxSwift",
+        "repositoryURL": "https://github.com/ReactiveX/RxSwift.git",
+        "state": {
+          "branch": null,
+          "revision": "b3e888b4972d9bc76495dd74d30a8c7fad4b9395",
+          "version": "5.0.1"
+        }
+      },
       {
         "package": "Spectre",
         "repositoryURL": "https://github.com/kylef/Spectre.git",

Package.swift

@@ -29,6 +29,7 @@ let package = Package(
         .package(url: "https://github.com/tuist/XcodeProj", .upToNextMajor(from: "7.5.0")),
         .package(url: "https://github.com/apple/swift-package-manager", .upToNextMajor(from: "0.5.0")),
         .package(url: "https://github.com/IBM-Swift/BlueSignals", .upToNextMajor(from: "1.0.21")),
+        .package(url: "https://github.com/ReactiveX/RxSwift.git", .upToNextMajor(from: "5.0.1"))
     ],
     targets: [
         .target(
@@ -49,15 +50,15 @@ let package = Package(
         ),
         .target(
             name: "TuistKit",
-            dependencies: ["XcodeProj", "SPMUtility", "TuistSupport", "TuistGenerator", "ProjectDescription", "Signals"]
+            dependencies: ["XcodeProj", "SPMUtility", "TuistSupport", "TuistGenerator", "ProjectDescription", "Signals", "RxSwift"]
         ),
         .testTarget(
             name: "TuistKitTests",
-            dependencies: ["TuistKit", "TuistSupportTesting", "ProjectDescription"]
+            dependencies: ["TuistKit", "TuistSupportTesting", "ProjectDescription", "RxBlocking"]
         ),
         .testTarget(
             name: "TuistKitIntegrationTests",
-            dependencies: ["TuistKit", "TuistSupportTesting", "ProjectDescription"]
+            dependencies: ["TuistKit", "TuistSupportTesting", "ProjectDescription", "RxBlocking"]
         ),
         .target(
             name: "tuist",