Changelog.md in argon2-1.1.4 vs Changelog.md in argon2-1.1.5

@@ -1,4 +1,8 @@
+## v1.1.5: 2018-04-30
+- Documentation updates
+- Pulled latest reference
+
 ## v1.1.2: 2017-02-25
 - Fix build on SmartOS
 
 ## v1.1.1: 2016-09-21
 - Fix verify against externally created hashes with different salt lengths