Bumped to v1.5.0

Updated CHANGELOG

Author: JaffaKetchup

pkgs/http/CHANGELOG.md

@@ -1,5 +1,6 @@
-## 1.4.1
+## 1.5.0
 
+* Added support for abortion of requests
 * Clarify that some header names may not be sent/received.
 
 ## 1.4.0

pkgs/http/pubspec.yaml

@@ -1,5 +1,5 @@
 name: http
-version: 1.4.1-wip
+version: 1.5.0-wip
 description: A composable, multi-platform, Future-based API for HTTP requests.
 repository: https://github.com/dart-lang/http/tree/master/pkgs/http
 
@@ -15,7 +15,7 @@ dependencies:
   async: ^2.5.0
   http_parser: ^4.0.0
   meta: ^1.3.0
-  web: '>=0.5.0 <2.0.0'
+  web: ">=0.5.0 <2.0.0"
 
 dev_dependencies:
   dart_flutter_team_lints: ^3.0.0