According to our release schedule, we maintain two branches, master and dev. If you send a bugfix pull request, please do it against the master branch, if it's a feature pull request, please do it against the dev branch.
We are using Github Issues for bug tracking. The best way to get your bug fixed is using our issue helper and provide reproduction steps with this template. Before you report a bug, please make sure you've searched existing issues, and read our FAQ.
If you intend to introduce new feature, we also recommend you use our issue helper to create a feature request issue.