Merge pull request #9 from davidmorgan/fix-homepage

Fix homepage.

Author: davidmorgan

built_json_generator/pubspec.yaml

@@ -5,7 +5,7 @@ description: >
   This library is the dev dependency.
 authors:
 - David Morgan <davidmorgan@google.com>
-homepage: https://github.com/google/built_value.dart
+homepage: https://github.com/google/built_json.dart
 
 environment:
   sdk: '>=1.12.0-dev.5.10 <2.0.0'