As so many people rely and depend on the Office Dev PnP efforts and results, it's worth considering contributing back to the community. As all content within the PnP effort are essentially free of charge and open source, it only works if others who benefit from this work contribute back for the greater good. As someone wise once said, sharing is caring!
You are not obligated to ask for permission if you wish to contribute. You can simply follow the guidance on what makes a good contribution, and what the technical approach to performing a commit back to a given repository is. The updated guidance can be found here: https://github.com/SharePoint/PnP-Guidance/blob/master/CONTRIBUTING.md, which includes information on how to make a copy of a repository and submit pull requests using GitHub.