Update README to point to new location (#73)

diff --git a/README.md b/README.md
index ec558d7..972aac2 100644
--- a/README.md
+++ b/README.md

@@ -1,16 +1 @@
-`shelf_static` is a `Handler` for the Dart `shelf` package.
-
-[![Build Status](https://github.com/dart-lang/shelf_static/workflows/Dart%20CI/badge.svg)](https://github.com/dart-lang/shelf_static/actions?query=workflow%3A"Dart+CI"+branch%3Amaster)
-
-### Example
-```dart
-import 'package:shelf/shelf_io.dart' as io;
-import 'package:shelf_static/shelf_static.dart';
-
-void main() {
-  var handler = createStaticHandler('example/files', 
-      defaultDocument: 'index.html');
-
-  io.serve(handler, 'localhost', 8080);
-}
-```
+This package has moved to https://github.com/dart-lang/shelf/tree/master/pkgs/shelf_static