Update changelog

Author: ashwoods

CHANGELOG.md

@@ -5,9 +5,13 @@ All notable changes to this project will be documented in this file.
 Project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html).
 
 
-6.8.0 (2018-05-11)
+6.8.0 (2018-05-12)
 ------------------
 * [Core] Fixed DSNs without secrets not sending events.
+* [Core] Added lazy import for pkg_resources
+* [Core] Added NamedTuple Serializer
+* [Sanic] Fixed sanic integration dependencies
+* [Django] Fixed sql hook bug
 
 6.7.0 (2018-04-18)
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