use uint64 for priority variable

Signed-off-by: Juan Peña <[email protected]>

client/v3/experimental/recipes/priority_queue.go

@@ -35,7 +35,7 @@ func NewPriorityQueue(client *v3.Client, key string) *PriorityQueue {
 }
 
 // Enqueue puts a value into a queue with a given priority.
-func (q *PriorityQueue) Enqueue(val string, pr uint16) error {
+func (q *PriorityQueue) Enqueue(val string, pr uint64) error {
 	prefix := fmt.Sprintf("%s%05d", q.key, pr)
 	_, err := newSequentialKV(q.client, prefix, val)
 	return err