Add missing imports to NAMESPACE and DESCRIPTION

Change-Id: Id03a13e5da18107dd486bbc72b1d47c71aff00ac
diff --git a/NAMESPACE b/NAMESPACE
index 03a0de3..8728527 100644
--- a/NAMESPACE
+++ b/NAMESPACE
@@ -8,3 +8,4 @@
 export(KorAPQuery)
 import(curl)
 import(jsonlite)
+import(utils)