CHANGELOG.md in xgb-0.5.0 vs CHANGELOG.md in xgb-0.5.1

@@ -1,4 +1,8 @@
+## 0.5.1 (2021-02-08)
+
+- Fixed error with validation sets without early stopping
+
 ## 0.5.0 (2020-12-12)
 
 - Updated XGBoost to 1.3.0
 
 ## 0.4.1 (2020-08-26)