Update README in root of repo

Author: JonathanPeterCole

README.md

@@ -5,20 +5,16 @@ A fork of [dart-lang/http](https://github.com/dart-lang/http) with support for r
 
 ## Packages
 
-Although this fork contains all of the packages from the source repo, currently only the `http` package has been updated with full support for cancellation.
+Although this fork contains all of the packages from the source repo, only the following packages have been updated with cancellation:
 
 | Package | Description | Version |
 |---|---|---|
 | [cancellation_token_http](pkgs/http/) | A composable, multi-platform, Future-based API for HTTP requests. | [![pub package](https://img.shields.io/pub/v/cancellation_token_http.svg)](https://pub.dev/packages/cancellation_token_http) |
-| [http_client_conformance_tests](pkgs/http_client_conformance_tests/) | A library that tests whether implementations of package:http's `Client` class behave as expected. | |
-| [cronet_http](pkgs/cronet_http/) | An Android Flutter plugin that provides access to the [Cronet](https://developer.android.com/guide/topics/connectivity/cronet/reference/org/chromium/net/package-summary) HTTP client. | [![pub package](https://img.shields.io/pub/v/cronet_http.svg)](https://pub.dev/packages/cronet_http) |
-| [cupertino_http](pkgs/cupertino_http/) | A macOS/iOS Flutter plugin that provides access to the [Foundation URL Loading System](https://developer.apple.com/documentation/foundation/url_loading_system). | [![pub package](https://img.shields.io/pub/v/cupertino_http.svg)](https://pub.dev/packages/cupertino_http) |
-| [http_profile](pkgs/http_profile/) | A library used by HTTP client authors to integrate with the DevTools Network View. | [![pub package](https://img.shields.io/pub/v/http_profile.svg)](https://pub.dev/packages/http_profile) |
-| [web_socket_conformance_tests](pkgs/web_socket_conformance_tests/) | A library that tests whether implementations of `package:web_socket`'s `WebSocket` class behave as expected. |  |
-| [web_socket](pkgs/web_socket/) | Any easy-to-use library for communicating with WebSockets that has multiple implementations. | [![pub package](https://img.shields.io/pub/v/web_socket.svg)](https://pub.dev/packages/web_socket) |
-| [flutter_http_example](pkgs/flutter_http_example/) | An Flutter app that demonstrates how to configure and use `package:http`. | — |
+| [cancellation_token_http_client_conformance_tests](pkgs/http_client_conformance_tests/) | A library that tests whether implementations of package:cancellation_token_http's `Client` class behave as expected. | |
 
-## Contributing
+## Testing
 
-If you'd like to contribute to any of these packages, see the
-[Contributing Guide](CONTRIBUTING.md).
+If you get the following error when running tests, make sure you use `dart test` instead of `flutter test`:
+```
+IsolateSpawnException: Unable to spawn isolate: Error: Couldn't resolve the package 'cancellation_token_http' in 'package:cancellation_token_http/http.dart'.
+```