Add platform check

Author: onmyway133

EasyClosure.xcodeproj/project.pbxproj

@@ -1,3 +1,5 @@
+#if canImport(AppKit)
+
 import XCTest
 import EasyClosure
 
@@ -18,3 +20,5 @@ class macOSTests: XCTestCase {
         button.on.tap {}
     }
 }
+
+#endif

EasyClosureTests/Mac/macOSTests.swift

@@ -1,3 +1,5 @@
+#if canImport(UIKit) && os(iOS)
+
 import XCTest
 import EasyClosure
 import UIKit
@@ -9,3 +11,5 @@ class EasyClosureTests: XCTestCase {
         button.on.tap {}
     }
 }
+
+#endif

EasyClosureTests/iOS/iOSTests.swift

@@ -1,45 +1,28 @@
-// swift-tools-version:5.0
+// swift-tools-version:5.1
 // The swift-tools-version declares the minimum version of Swift required to build this package.
 import PackageDescription
 
 let package = Package(
     name: "EasyClosure",
     platforms: [
-        .macOS(.v10_13),
-        .iOS(.v10),
-        .tvOS(.v11)
+        .macOS(.v10_15),
+        .iOS(.v13),
+        .tvOS(.v13),
+        .watchOS(.v6)
     ],
     products: [
         .library(
             name: "EasyClosure",
-            targets: ["EasyClosureiOS"]
-        ),
-        .library(
-            name: "EasyClosure",
-            targets: ["EasyClosuremacOS"]
-        )
-    ],
-    dependencies: [
-        // Dependencies declare other packages that this package depends on.
-        // .package(url: /* package url */, from: "1.0.0"),
+            targets: ["EasyClosure"]),
     ],
     targets: [
         .target(
-            name: "EasyClosureiOS",
-            dependencies: [],
-            path: "Sources",
-            sources: ["Shared", "iOS"]
-        ),
-        .target(
-            name: "EasyClosuremacOS",
-            dependencies: [],
-            path: "Sources",
-            sources: ["Shared", "macOS"]
+            name: "EasyClosure",
+            path: "Sources"
         ),
         .testTarget(
             name: "EasyClosureTests",
-            dependencies: ["EasyClosure"],
-            path: "EasyClosureTests/iOS"
-        ),
-    ]
+            dependencies: ["EasyClosure"]),
+    ],
+    swiftLanguageVersions: [.v5]
 )