Fix test

Author: phischu

examples/benchmarks/input_output/interleave_promises.effekt

@@ -4,6 +4,7 @@ import bytearray
 import list
 import io
 import io/error
+import io/promise
 import io/filesystem
 
 

libraries/common/io/promise.effekt

@@ -94,7 +94,8 @@ extern {io, global} def resolve[T](promise: Promise[T], value: T): Unit =
       case Pending(futures) =>
         // TODO use reference.set
         set(reference, Resolved(value))
-        futures.reverse.foreach { future => future.fill(value) }
+        // TODO use futures.reverse.foreach
+        foreach(reverse(futures)) { future => fill(future, value) }
     }
   }