Support the latest pkg:http (dev dependency)
diff --git a/pubspec.yaml b/pubspec.yaml
index 03dd31a..cededc1 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -15,5 +15,5 @@
   stream_channel: ">1.4.0 <3.0.0"
 
 dev_dependencies:
-  http: ">=0.10.0 <0.12.0"
+  http: ">=0.10.0 <0.13.0"
   test: ^1.0.0