Fix README for TaskCompletionSource.cancel() (#37)

README.md

@@ -93,7 +93,7 @@ fetchProfile(user).continueOnSuccessWithTask { task in
 ## Creating Tasks
 
 To create a task - you would need a `TaskCompletionSource`, which is a consumer end of any `Task`, which gives you an ability to control whether the task is completed/faulted or cancelled.
-After you create a `TaskCompletionSource`, you need to call `setResult()`/`setError()`/`setCancelled` to trigger its continuations and change its state.
+After you create a `TaskCompletionSource`, you need to call `setResult()`/`setError()`/`cancel()` to trigger its continuations and change its state.
 ```swift
 func fetch(object: PFObject) -> Task<PFObject> {
   let taskCompletionSource = TaskCompletionSource<PFObject>()
@@ -103,7 +103,7 @@ func fetch(object: PFObject) -> Task<PFObject> {
     } else if let object = object {
       taskCompletionSource.setResult(object)
     } else {
-      taskCompletionSource.setCancelled()
+      taskCompletionSource.cancel()
     }
   }
   return taskCompletionSource.task