Update dart:collection to version 1.0.0

R=sgjesse@google.com

Review URL: https://codereview.chromium.org//463333004

git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart/pkg/shelf@39484 260f80e4-7a28-3924-810f-c04153c831b5
diff --git a/pubspec.yaml b/pubspec.yaml
index 4e7c128..01ae8de 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,12 +1,12 @@
 name: shelf
-version: 0.5.4+2
+version: 0.5.4+3
 author: Dart Team <misc@dartlang.org>
 description: Web Server Middleware for Dart
 homepage: http://www.dartlang.org
 environment:
   sdk: '>=1.4.0 <2.0.0'
 dependencies:
-  collection: '>=0.9.4 <0.10.0'
+  collection: '>=0.9.4 <2.0.0'
   http_parser: '>=0.0.0 <0.1.0'
   path: '>=1.0.0 <2.0.0'
   stack_trace: '>=0.9.2 <2.0.0'