Update CHANGELOG.md

smorimoto · smorimoto · commit 21f6ccaebf40 · 2021-10-24T04:38:03.000+09:00
Signed-off-by: Sora Morimoto &lt;sora@morimoto.io&gt;
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -8,6 +8,10 @@ and this project adheres to
 
 ## [unreleased]
 
+### Added
+
+- Added "extends" experimentally.
+
 ## [2.0.0-beta5]
 
 ### Changed
