Ready cupertino_http 1.5 for publish (#1210)

Author: brianquinlan

pkgs/cupertino_http/pubspec.yaml

@@ -1,10 +1,9 @@
 name: cupertino_http
-version: 1.5.0-wip
+version: 1.5.0
 description: >-
   A macOS/iOS Flutter plugin that provides access to the Foundation URL
   Loading System.
 repository: https://github.com/dart-lang/http/tree/master/pkgs/cupertino_http
-publish_to: none
 
 environment:
   sdk: ^3.4.0