update to get future values from new blackbird library unexported met…

…hod: promise-values

src/green-threads.lisp

@@ -273,7 +273,7 @@
 (defun future-values (future)
   "Returns the values given to the future when it
    was completed."
-  (values-list (cl-async-future::future-values future)))
+  (values-list (blackbird::promise-values future)))
 
 (defun/cc wait-on (future)
   "Requires CL-CONT:WITH-CALL/CC environment, causes the current