Set main Package.swift to Swift tools v5.9

Author: lukaskubanek

Package.swift

@@ -1,4 +1,4 @@
-// swift-tools-version: 6.0
+// swift-tools-version: 5.9
 
 import PackageDescription
 
@@ -15,8 +15,7 @@ let package = Package(
         ),
     ],
     targets: [
-        .target(
-            name: "CombineExtensions"),
+        .target(name: "CombineExtensions"),
         .testTarget(
             name: "CombineExtensionsTests",
             dependencies: ["CombineExtensions"]

Package@swift-6.0.swift

@@ -0,0 +1,25 @@
+// swift-tools-version: 6.0
+
+import PackageDescription
+
+let package = Package(
+    name: "CombineExtensions",
+    platforms: [
+        .macOS(.v11),
+        .iOS(.v14),
+    ],
+    products: [
+        .library(
+            name: "CombineExtensions",
+            targets: ["CombineExtensions"]
+        ),
+    ],
+    targets: [
+        .target(name: "CombineExtensions"),
+        .testTarget(
+            name: "CombineExtensionsTests",
+            dependencies: ["CombineExtensions"]
+        ),
+    ],
+    swiftLanguageModes: [.v6]
+)