update CHANGES.txt with intended release date

rouilj · rouilj · commit efd0c35f7f55 · 2018-07-06T23:13:04.000-04:00
diff --git a/CHANGES.txt b/CHANGES.txt
@@ -11,7 +11,7 @@ Python v2.5 and v2.6.  Starting with the v1.6 releases of Roundup
 v2.7.2 is required to run newer releases of Roundup.
 
 
-2018-??-??: 1.6.0
+2018-07-13 1.6.0
 
 Features:
 
