do not break older Swift version support by creating a swift 5.9 expl…

…icit Package.swift file

Package.swift

@@ -1,10 +1,10 @@
-// swift-tools-version:5.9
+// swift-tools-version:5.7
 import PackageDescription
 
 let package = Package(
     name: "Nimble",
     platforms: [
-      .macOS(.v10_15), .iOS(.v13), .tvOS(.v13), .watchOS(.v6), .visionOS(.v1)
+      .macOS(.v10_15), .iOS(.v13), .tvOS(.v13), .watchOS(.v6)
     ],
     products: [
         .library(
@@ -19,8 +19,7 @@ let package = Package(
         ),
     ],
     dependencies: [
-        // TODO: use official repo once merged
-        .package(url: "https://github.com/bitmovin-engineering/CwlPreconditionTesting.git", branch: "bitmovin/feature/visionos-support"),
+        .package(url: "https://github.com/mattgallagher/CwlPreconditionTesting.git", .upToNextMajor(from: "2.1.0")),
     ],
     targets: {
         var testHelperDependencies: [PackageDescription.Target.Dependency] = ["Nimble"]
@@ -32,7 +31,7 @@ let package = Package(
                 name: "Nimble",
                 dependencies: [
                     .product(name: "CwlPreconditionTesting", package: "CwlPreconditionTesting",
-                             condition: .when(platforms: [.macOS, .iOS, .macCatalyst, .visionOS])),
+                             condition: .when(platforms: [.macOS, .iOS, .macCatalyst])),
                     .product(name: "CwlPosixPreconditionTesting", package: "CwlPreconditionTesting",
                              condition: .when(platforms: [.tvOS, .watchOS]))
                 ],

Package@swift-5.9.swift

@@ -0,0 +1,66 @@
+// swift-tools-version:5.9
+import PackageDescription
+
+let package = Package(
+    name: "Nimble",
+    platforms: [
+      .macOS(.v10_15), .iOS(.v13), .tvOS(.v13), .watchOS(.v6), .visionOS(.v1)
+    ],
+    products: [
+        .library(
+            name: "Nimble",
+            targets: {
+                var targets: [String] = ["Nimble"]
+ #if os(macOS)
+                targets.append("NimbleObjectiveC")
+ #endif
+                return targets
+            }()
+        ),
+    ],
+    dependencies: [
+        // TODO: use official repo once merged
+        .package(url: "https://github.com/bitmovin-engineering/CwlPreconditionTesting.git", branch: "bitmovin/feature/visionos-support"),
+    ],
+    targets: {
+        var testHelperDependencies: [PackageDescription.Target.Dependency] = ["Nimble"]
+        #if os(macOS)
+        testHelperDependencies.append("NimbleObjectiveC")
+        #endif
+        var targets: [Target] = [
+            .target(
+                name: "Nimble",
+                dependencies: [
+                    .product(name: "CwlPreconditionTesting", package: "CwlPreconditionTesting",
+                             condition: .when(platforms: [.macOS, .iOS, .macCatalyst, .visionOS])),
+                    .product(name: "CwlPosixPreconditionTesting", package: "CwlPreconditionTesting",
+                             condition: .when(platforms: [.tvOS, .watchOS]))
+                ],
+                exclude: ["Info.plist"]
+            ),
+            .target(
+                name: "NimbleSharedTestHelpers",
+                dependencies: testHelperDependencies
+            ),
+            .testTarget(
+                name: "NimbleTests",
+                dependencies: ["Nimble", "NimbleSharedTestHelpers"],
+                exclude: ["Info.plist"]
+            ),
+        ]
+#if os(macOS)
+        targets.append(contentsOf: [
+            .target(
+                name: "NimbleObjectiveC",
+                dependencies: ["Nimble"]
+            ),
+            .testTarget(
+                name: "NimbleObjectiveCTests",
+                dependencies: ["NimbleObjectiveC", "Nimble", "NimbleSharedTestHelpers"]
+            )
+        ])
+ #endif
+        return targets
+    }(),
+    swiftLanguageVersions: [.v5]
+)