pkg/shelf: handle errors when parsing HttpRequest in shelf_io

pkg/shelf/CHANGELOG.md

Index: pkg/shelf/CHANGELOG.md
diff --git a/pkg/shelf/CHANGELOG.md b/pkg/shelf/CHANGELOG.md
index f74d43707eba1cb75aaaf17d31793cb9dedeae50..d7b74b6090dcc07564201ad57d088236b2a82b10 100644
--- a/pkg/shelf/CHANGELOG.md
+++ b/pkg/shelf/CHANGELOG.md
@@ -1,6 +1,9 @@
-## 0.5.6-dev
+## 0.5.6
 
-* Fixed `createMiddleware` to only catch errors in `errorHandler` is provided.
+* Fixed `createMiddleware` to only catch errors if `errorHandler` is provided.
+
+* Updated `handleRequest` in `shelf_io` to more gracefully handle errors when
+  parsing `HttpRequest`.
 
 ## 0.5.5+1