Added tag v2.3.1 for changeset 13cb4ed640f3
diff --git a/.hgtags b/.hgtags
index 1ce169e..8aa8271 100644
--- a/.hgtags
+++ b/.hgtags
@@ -502,3 +502,4 @@
 94ae39b9a9279bdd0a99588a9017080baae9faf0 v2.1.1
 74274bb47d3ccba3543097ce963957df6901f511 v2.2.0
 05b481ea7a8e0c9d9954e7ba661626f0ccb6fb85 v2.3.0
+13cb4ed640f3d136dcfc4afc168c508cc8631c50 v2.3.1