Remove pubspec author, fix URL in readme (flutter#71)

Author: kevmoo

README.md

@@ -1,5 +1,5 @@
 [![Build Status](https://travis-ci.org/dart-lang/package_config.svg?branch=master)](https://travis-ci.org/dart-lang/package_config)
-[![pub package](https://img.shields.io/pub/v/package_config.svg)](https://pub.dartlang.org/packages/package_config)
+[![pub package](https://img.shields.io/pub/v/package_config.svg)](https://pub.dev/packages/package_config)
 
 Support for working with **Package Configuration** files as described
 in the Package Configuration v2 [design document](https://github.com/dart-lang/language/blob/master/accepted/future-releases/language-versioning/package-config-file-v2.md).

pubspec.yaml

@@ -1,7 +1,6 @@
 name: package_config
 version: 1.9.0-dev
 description: Support for working with Package Configuration files.
-author: Dart Team <[email protected]>
 homepage: https://github.com/dart-lang/package_config
 
 environment: