improvement: add trending user repo

lib/models/github.dart

@@ -227,7 +227,7 @@ class GithubTrendingUser {
 
 @JsonSerializable()
 class GithubTrendingUserRepo {
-  String username;
+  String name;
   String description;
 
   GithubTrendingUserRepo();

lib/models/github.g.dart

@@ -268,13 +268,13 @@ Map<String, dynamic> _$GithubTrendingUserToJson(GithubTrendingUser instance) =>
 GithubTrendingUserRepo _$GithubTrendingUserRepoFromJson(
     Map<String, dynamic> json) {
   return GithubTrendingUserRepo()
-    ..username = json['username'] as String
+    ..name = json['name'] as String
     ..description = json['description'] as String;
 }
 
 Map<String, dynamic> _$GithubTrendingUserRepoToJson(
         GithubTrendingUserRepo instance) =>
     <String, dynamic>{
-      'username': instance.username,
+      'name': instance.name,
       'description': instance.description,
     };