Support http_parser 2.0.0.

R=kevmoo@google.com

Review URL: https://codereview.chromium.org//1522923003 .
diff --git a/CHANGELOG.md b/CHANGELOG.md
index f5865d2..e81b5c6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# 1.0.1
+
+* Support `http_parser` 2.0.0.
+
 # 1.0.0
 
 ## Breaking changes
diff --git a/pubspec.yaml b/pubspec.yaml
index bd6bd4c..559fc7b 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,5 +1,5 @@
 name: oauth2
-version: 1.0.0
+version: 1.0.1
 author: Dart Team <misc@dartlang.org>
 homepage: http://github.com/dart-lang/oauth2
 description: >
@@ -10,6 +10,6 @@
   sdk: '>=1.9.0 <2.0.0'
 dependencies:
   http: '>=0.11.0 <0.12.0'
-  http_parser: '^1.0.0'
+  http_parser: '>=1.0.0 <3.0.0'
 dev_dependencies:
   test: '>=0.12.0 <0.13.0'