Changelog.md in argon2-2.0.0 vs Changelog.md in argon2-2.0.1

@@ -1,4 +1,7 @@
+## v2.0.0: 2019-01-06
+- Defaults to Argon2id for new hashes
+
 ## v1.2.0: 2018-11-29
 - Support for verifying Argon2id format
 
 ## v1.1.5: 2018-04-30
 - Documentation updates