CHANGELOG.md in groupdate-4.0.2 vs CHANGELOG.md in groupdate-4.1.0

@@ -1,4 +1,11 @@
+## 4.1.0
+
+- Many performance improvements
+- Added check for consistent time zone info
+- Fixed error message for invalid queries with MySQL and SQLite
+- Fixed issue with enumerable methods ignoring nils
+
 ## 4.0.2
 
 - Make `current` option work without `last`
 - Fixed default value for `maximum`, `minimum`, and `average`