Added check for errors on QuerySerializer

Change-Id: Ie3dc8ebfe4e40076ce3c7e8808eb38f300b98f5e
diff --git a/Changes b/Changes
index 51e3dbb..4521dbb 100644
--- a/Changes
+++ b/Changes
@@ -1,3 +1,6 @@
+0.29 2018-07-05
+  - Added check for errors on QuerySerializer object (diewald)
+
 0.28 2018-01-10
 	- Added some enums for koral:operation (margaretha)
 	- Fixed node serialization of Annis QL containing lemma (margaretha)