Update CHANGELOG.md for tuple key path support.

jckarter · web-flow · commit dfafdd44987b · 2019-02-25T12:57:59.000-08:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -21,6 +21,11 @@ CHANGELOG
 
 </details>
 
+Swift 5.1
+---------
+
+* Key path expressions can now include references to tuple elements.
+
 Swift 5.0
 ---------
 
