storage: release storage/v1.4.0

Change-Id: Ia1cc0988052feee4d718e670a94ed208282f9cb2
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/48613
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Eli Bendersky <eliben@google.com>
Reviewed-by: Jean de Klerk <deklerk@google.com>
diff --git a/storage/CHANGES.md b/storage/CHANGES.md
index f3468a9..ff9b6fd 100644
--- a/storage/CHANGES.md
+++ b/storage/CHANGES.md
@@ -1,5 +1,10 @@
 # Changes
 
+## v1.4.0
+
+- When listing objects in a bucket, allow callers to specify which attributes
+  are queried. This allows for performance optimization.
+
 ## v1.3.0
 
 - Use `storage.googleapis.com/storage/v1` by default for GCS requests