fix(github): update trending api

closes #110

lib/screens/gh_trending.dart

@@ -10,15 +10,17 @@ import 'package:git_touch/widgets/repository_item.dart';
 import 'package:provider/provider.dart';
 
 class GhTrendingScreen extends StatelessWidget {
+  static final trending = GithubTrending(prefix: 'https://gtrend.yapie.me');
+
   Widget build(BuildContext context) {
     return TabStatefulScaffold<List>(
       title: AppBarTitle('Trending'),
       tabs: ['Repositories', 'Developers'],
       fetchData: (tabIndex) async {
         if (tabIndex == 0) {
-          return getTrendingRepositories();
+          return trending.getTrendingRepositories();
         } else {
-          return getTrendingDevelopers();
+          return trending.getTrendingDevelopers();
         }
       },
       bodyBuilder: (payload, activeTab) {

pubspec.yaml

@@ -44,7 +44,7 @@ dependencies:
   #   url: git://github.com/pd4d10/github.dart.git
   #   ref: patch-1
   # path: ../../github/github.dart
-  github_trending: ^0.2.0
+  github_trending: ^0.3.0
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.0