Update version to 4.0.0

1024jp · 1024jp · commit b04a8c1c3d72 · 2026-05-04T20:48:30.000+09:00
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Change Log
 
-4.0.0 (unreleased)
+4.0.0 (2026-05-04)
 --------------------------
 
 ### Added
