Support crypto 2.0.0.

R=whesse@google.com

Review URL: https://codereview.chromium.org//2036343004 .

pkgs/web_socket_channel/CHANGELOG.md

diff --git a/pkgs/web_socket_channel/CHANGELOG.md b/pkgs/web_socket_channel/CHANGELOG.md
index 90f5aaf..86a1110 100644
--- a/pkgs/web_socket_channel/CHANGELOG.md
+++ b/pkgs/web_socket_channel/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 1.0.4
+
+* Support `crypto` 2.0.0.
+
 ## 1.0.3
 
 * Fix all strong-mode errors and warnings.

pkgs/web_socket_channel/pubspec.yaml

diff --git a/pkgs/web_socket_channel/pubspec.yaml b/pkgs/web_socket_channel/pubspec.yaml
index 7a8c0fe..3a95d49 100644
--- a/pkgs/web_socket_channel/pubspec.yaml
+++ b/pkgs/web_socket_channel/pubspec.yaml
@@ -1,5 +1,5 @@
 name: web_socket_channel
-version: 1.0.3
+version: 1.0.4
 description: StreamChannel wrappers for WebSockets.
 author: Dart Team <misc@dartlang.org>
 homepage: https://github.com/dart-lang/web_socket_channel
@@ -9,7 +9,7 @@
 
 dependencies:
   async: '^1.3.0'
-  crypto: '>=0.9.2 <2.0.0'
+  crypto: '>=0.9.2 <3.0.0'
   stream_channel: '^1.2.0'
 
 dev_dependencies: