Update pubspec.yaml (#28)

diff --git a/pubspec.yaml b/pubspec.yaml
index 93d15ea..1dae730 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,7 +1,7 @@
 name: sync_http
 version: 0.3.1-dev
 description: Synchronous HTTP client for Dart.
-homepage: https://github.com/google/sync_http.dart
+repository: https://github.com/google/sync_http.dart
 
 environment:
   sdk: '>=2.12.0 <3.0.0'