Fix availability marker for Swift 5.9 compiler targeting host machine

When building JavaScriptKit with Xcode, targeting host machine, the
`func enqueue(_: ExecutorJob)` must be guarded by `@available` attribute
explicitly. And due to the 5.9 compiler issue, it emit some migration
warnings too consevatively. This commit suppress the warning by updating
minimum available OS versions. Those versions should not be a problem
when building for Wasm.

Sources/JavaScriptEventLoop/JavaScriptEventLoop.swift

@@ -34,7 +34,7 @@ import JavaScriptEventLoop
 JavaScriptEventLoop.installGlobalExecutor()
 ```
 */
-@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
+@available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *)
 public final class JavaScriptEventLoop: SerialExecutor, @unchecked Sendable {
 
     /// A function that queues a given closure as a microtask into JavaScript event loop.
@@ -92,7 +92,7 @@ public final class JavaScriptEventLoop: SerialExecutor, @unchecked Sendable {
 
         typealias swift_task_enqueueGlobal_hook_Fn = @convention(thin) (UnownedJob, swift_task_enqueueGlobal_original) -> Void
         let swift_task_enqueueGlobal_hook_impl: swift_task_enqueueGlobal_hook_Fn = { job, original in
-            JavaScriptEventLoop.shared.enqueue(job)
+            JavaScriptEventLoop.shared.unsafeEnqueue(job)
         }
         swift_task_enqueueGlobal_hook = unsafeBitCast(swift_task_enqueueGlobal_hook_impl, to: UnsafeMutableRawPointer?.self)
 
@@ -112,7 +112,7 @@ public final class JavaScriptEventLoop: SerialExecutor, @unchecked Sendable {
 
         typealias swift_task_enqueueMainExecutor_hook_Fn = @convention(thin) (UnownedJob, swift_task_enqueueMainExecutor_original) -> Void
         let swift_task_enqueueMainExecutor_hook_impl: swift_task_enqueueMainExecutor_hook_Fn = { job, original in
-            JavaScriptEventLoop.shared.enqueue(job)
+            JavaScriptEventLoop.shared.unsafeEnqueue(job)
         }
         swift_task_enqueueMainExecutor_hook = unsafeBitCast(swift_task_enqueueMainExecutor_hook_impl, to: UnsafeMutableRawPointer?.self)
 
@@ -130,15 +130,20 @@ public final class JavaScriptEventLoop: SerialExecutor, @unchecked Sendable {
         })
     }
 
+    private func unsafeEnqueue(_ job: UnownedJob) {
+        insertJobQueue(job: job)
+    }
+
     #if compiler(>=5.9)
+    @available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *)
     public func enqueue(_ job: consuming ExecutorJob) {
         // NOTE: Converting a `ExecutorJob` to an ``UnownedJob`` and invoking
         // ``UnownedJob/runSynchronously(_:)` on it multiple times is undefined behavior.
-        insertJobQueue(job: UnownedJob(job))
+        unsafeEnqueue(UnownedJob(job))
     }
     #else
     public func enqueue(_ job: UnownedJob) {
-        insertJobQueue(job: job)
+        unsafeEnqueue(job)
     }
     #endif
 
@@ -155,7 +160,7 @@ internal func swift_get_time(
   _ nanoseconds: UnsafeMutablePointer<Int64>,
   _ clock: CInt)
 
-@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
+@available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *)
 extension JavaScriptEventLoop {
     fileprivate func enqueue(
         _ job: UnownedJob, withDelay seconds: Int64, _ nanoseconds: Int64,

Sources/JavaScriptEventLoop/JobQueue.swift

@@ -12,7 +12,7 @@ struct QueueState: Sendable {
     fileprivate var isSpinning: Bool = false
 }
 
-@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
+@available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *)
 extension JavaScriptEventLoop {
 
     func insertJobQueue(job newJob: UnownedJob) {

Sources/JavaScriptEventLoopTestSupport/JavaScriptEventLoopTestSupport.swift

@@ -22,7 +22,7 @@ import JavaScriptEventLoop
 
 #if compiler(>=5.5)
 
-@available(macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0, *)
+@available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *)
 @_cdecl("swift_javascriptkit_activate_js_executor_impl")
 func swift_javascriptkit_activate_js_executor_impl() {
     JavaScriptEventLoop.installGlobalExecutor()