Merge pull request #1238 from ueman/fix-pubspec

Fix links in pubspec.yaml

Author: vincenzopalazzo

packages/graphql/pubspec.yaml

@@ -1,7 +1,8 @@
 name: graphql
 description: A stand-alone GraphQL client for Dart, bringing all the features from a modern GraphQL client to one easy to use package.
 version: 5.1.2-beta.4
-homepage: https://github.com/zino-app/graphql-flutter/tree/master/packages/graphql
+repository: https://github.com/zino-app/graphql-flutter/tree/main/packages/graphql
+issue_tracker: https://github.com/zino-hofmann/graphql-flutter/issues
 
 dependencies:
   meta: ^1.3.0

packages/graphql_flutter/pubspec.yaml

@@ -1,7 +1,8 @@
 name: graphql_flutter
 description: A GraphQL client for Flutter, bringing all the features from a modern GraphQL client to one easy to use package.
 version: 5.1.1-beta.4
-homepage: https://github.com/zino-app/graphql-flutter/tree/master/packages/graphql_flutter
+repository: https://github.com/zino-app/graphql-flutter/tree/main/packages/graphql_flutter
+issue_tracker: https://github.com/zino-hofmann/graphql-flutter/issues
 
 dependencies:
   graphql: ^5.1.2-beta.1