Add AsyncQueue

Author: dfed

README.md

@@ -476,6 +476,7 @@ Please see [CONTRIBUTING](https://github.com/vsouza/awesome-ios/blob/master/.git
 - [GroupWork](https://github.com/quanvo87/GroupWork) - Easy concurrent, asynchronous tasks in Swift.
 - [StickyLocking](https://github.com/stickytools/sticky-locking) - A general purpose embedded hierarchical lock manager used to build highly concurrent applications of all types.
 - [SwiftCoroutine](https://github.com/belozierov/SwiftCoroutine) - Swift coroutines library for iOS and macOS.
+- [AsyncQueue](https://github.com/dfed/swift-async-queue) - A library of queues that enable sending ordered tasks from synchronous to asynchronous contexts.
 
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