update release date for 0.31

gdementen · gdementen · commit 006c85c81c6b · 2019-08-09T14:58:55.000+02:00
diff --git a/doc/source/changes.rst b/doc/source/changes.rst
@@ -4,7 +4,7 @@
 Version 0.31
 ============
 
-In development.
+Released on 2019-08-09.
 
 .. include:: ./changes/version_0_31.rst.inc
 
