Mark interop with AsyncSeq as completed

`FSharp.Control.AsyncSeq` implements conversion functions `ofAsyncEnum` and `toAsyncEnum`. 

See: 

 * https://github.com/fsprojects/FSharp.Control.AsyncSeq/blob/4210e65204e881f5f010676ce206c7636aa64e68/src/FSharp.Control.AsyncSeq/AsyncSeq.fsi#L536-L537
 * https://github.com/fsprojects/FSharp.Control.AsyncSeq/blob/4210e65204e881f5f010676ce206c7636aa64e68/src/FSharp.Control.AsyncSeq/AsyncSeq.fsi#L539-L540

Author: njlr

README.md

@@ -228,7 +228,7 @@ The `TaskSeq` project already has a wide array of functions and functionalities,
   - [ ] Make the tasks cancellable with token (see [#133]). **PLANNED FOR 0.5-alpha**
   - [ ] Support `ConfiguredCancelableAsyncEnumerable` (see [#167]). **PLANNED FOR 0.5-alpha**
   - [ ] Interop with `cancellableTask` and `valueTask` from [`IcedTasks`][24]
-- [ ] Interop with `AsyncSeq`.
+- [x] Interop with `AsyncSeq` (implemented in `FSharp.Control.AsyncSeq` package).
 - [ ] (maybe) Support any awaitable type in the function lib (that is: where a `Task` is required, accept a `ValueTask` and `Async` as well)
 - [ ] Add `TaskEx` functionality (separate lib). **DISCUSSION**
 - [ ] Move documentation to <https://fsprojects.github.io>