Add Swift 6 Release Notes

Author: mythz

README.md

@@ -44,7 +44,7 @@ After adding the dependency both [ServiceStack.Swift](https://github.com/Service
 ```swift
 dependencies: [
     .package(name: "ServiceStack", url: "https://github.com/ServiceStack/ServiceStack.Swift.git", 
-        Version(5,0,0)..<Version(6,0,0)),
+        Version(6,0,0)..<Version(7,0,0)),
 ],
 ```
 
@@ -56,13 +56,44 @@ In your [Podfile](https://guides.cocoapods.org/syntax/podfile.html):
 use_frameworks!
 
 # Pods for Project
-pod "ServiceStack", '~> 5.0'
+pod "ServiceStack", '~> 6.0'
 ```
 
 #### Carthage
 
 ```ruby
-github "ServiceStack/ServiceStack.Swift" ~> 5.0
+github "ServiceStack/ServiceStack.Swift" ~> 6.0
+```
+
+### v6.0.0 Release
+
+The latest **v6** Release is now dependency-free, where its PromiseKit async APIs have been replaced to use 
+[Swift's native Concurrency](https://docs.swift.org/swift-book/documentation/the-swift-programming-language/concurrency/) support.
+
+```swift
+import ServiceStack
+
+let client = JsonServiceClient(baseUrl:baseUrl)
+```
+
+#### Async
+
+```swift
+let request = Hello()
+request.name = "World"
+
+let response = try await client.postAsync(request)
+print(response.result!)
+```
+
+#### Sync
+
+```swift
+let request = Hello()
+request.name = "World"
+
+let response = try client.post(request)
+print(response.result!)
 ```
 
 ### v5.0.0 Release

Tests/ServiceStackTests/JsonServiceClientTests.swift

@@ -16,6 +16,22 @@ final class JsonServiceClientTests : @unchecked Sendable {
         client = JsonServiceClient(baseUrl: "https://test.servicestack.net")
     }
 
+    @Test func Can_GET_Hello() throws {
+        let request = Hello()
+        request.name = "World"
+
+        let response = try client.post(request)
+        print(response.result!)
+    }
+
+    @Test func Can_GET_Hello_async() async throws {
+        let request = Hello()
+        request.name = "World"
+
+        let response = try await client.postAsync(request)
+        print(response.result!)
+    }
+
     @Test func Can_POST_Test_HelloAllTypes_async() async throws {
         let request = createHelloAllTypes()