Fix a link to shelf in the README.

Closes #1

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//1318033004 .
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 296e2d3..f69d1f1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 0.0.1+4
+
+* Fix a link to `shelf` in the README.
+
 ## 0.0.1+3
 
 * Support `http_parser` 1.0.0.
diff --git a/README.md b/README.md
index 9091de0..aa9379e 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 `onConnection` callback with a [CompatibleWebSocket][] object for every
 connection that's established.
 
-[Shelf]: pub.dartlang.org/packages/shelf
+[Shelf]: https://pub.dartlang.org/packages/shelf
 
 [WebSocket]: https://tools.ietf.org/html/rfc6455
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 0bfc859..1e17a13 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: shelf_web_socket
-version: 0.0.1+3
+version: 0.0.1+4
 author: "Dart Team <misc@dartlang.org>"
 homepage: http://github.com/dart-lang/shelf_web_socket
 description: >