Fix refreshing skipping items

Closes #147

Pachyderm/Sources/Pachyderm/Request/RequestRange.swift

@@ -25,7 +25,7 @@ extension RequestRange {
         case let .before(id, count):
             return ["max_id" => id, "count" => count]
         case let .after(id, count):
-            return ["min_id" => id, "count" => count]
+            return ["since_id" => id, "count" => count]
         }
     }
 }