Add date to release notes and note on dropping python 2 support.

twiecki · twiecki · commit 081e7f4a55ce · 2018-12-20T19:02:54.000+01:00
diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
@@ -1,6 +1,8 @@
 # Release Notes
 
-## PyMC3 3.6 (unreleased)
+## PyMC3 3.6 (Dec 21 2018)
+
+This will be the last release to support Python 2.
 
 ### New features
 
