Added release notes for version 4.2.1

Package.swift

@@ -20,7 +20,7 @@ let package = Package(
                 "FCSDKiOS",
                 "CBARealTime"
             ]),
-        .binaryTarget(name: "FCSDKiOS", url: "https://swift-sdk.s3.us-east-2.amazonaws.com/client_sdk/FCSDKiOS-4.2.2.xcframework.zip", checksum: "37e5e877df6b5ee37dd1f8f7ae1fc759436a2204d27ad0afbc4a8a982736adb9"),
+        .binaryTarget(name: "FCSDKiOS", url: "https://swift-sdk.s3.us-east-2.amazonaws.com/client_sdk/FCSDKiOS-4.2.1.xcframework.zip", checksum: "5598dae22f9665a3dc454c16b9e2aec98b95ca94f2f5afd468313bdf374b97be"),
         .binaryTarget(name: "CBARealTime", url: "https://swift-sdk.s3.us-east-2.amazonaws.com/real_time/CBARealTime-m110-1.0.0.xcframework.zip", checksum: "a2f4cee24ce4389aa00feb86edd8dc8c67a43aedf1f8b4ceb5998c94f16a5e3d")
     ]
 )

README.md

@@ -21,6 +21,8 @@
 We are happy to introduce *DocC* documenation for SwiftFCSDKiOS. Simply build the documentaion with **Command + Control + Shift + D** in your app and have all the documentation that you need right in Xcode.
 
 ## Version Changes
+[Version 4.2.1 ](https://github.com/cbajapan/swift-fcsdk-ios/blob/main/Sources/SwiftFCSDKiOS/SwiftFCSDKiOS.docc/Version-4.2.1.md 'Version 4.2.1')
+
 [Version 4.2.0 ](https://github.com/cbajapan/swift-fcsdk-ios/blob/main/Sources/SwiftFCSDKiOS/SwiftFCSDKiOS.docc/Version-4.2.0.md 'Version 4.2.0')
 
 [Version 4.1.0 ](https://github.com/cbajapan/swift-fcsdk-ios/blob/main/Sources/SwiftFCSDKiOS/SwiftFCSDKiOS.docc/Version-4.1.0.md 'Version 4.1.0')

Sources/SwiftFCSDKiOS/SwiftFCSDKiOS.docc/Version-4.2.1.md

@@ -0,0 +1,36 @@
+# Version 4.2.1
+
+This article describes changes in version 4.2.1 of FCSDKiOS
+
+## Overview
+
+Version 4.2.1 has several bug fixes and performance improvements. Below is a list of bug fixes.
+
+### CBA Swift FCSDK minimum iOS Version support
+FCSDKiOS has a minimum version of iOS 13. However, we now allow you to consume our SDK when your projects have a minimum version of iOS 11. You must use the appropriate runtime and compile time checks when using the SDK. This is easily achieved with the following code:
+
+*Run Time*
+```swift
+@available(iOS 13.0, *)
+//Your Run Time Method
+```
+
+```swift
+if #available(iOS 14.0, *) {
+    //Your Run Time Code
+}
+```
+
+*Compile Time*
+```swift
+#if canImport(_Concurrency)
+// Your Compile Time Code
+#endif
+
+```
+### Fixed **setDefaultAudio()** not working
+When `setDefaultAudio()` was called, it did not properly use the set value when audio hardware routes changed. We now have fixed this issue.
+
+### Status Media changed to media pending after agent answered
+We fixed an issue involving the call state changing at a certain point in the call flow's stream of events when receiving an inbound call.
+