If you like the project and you would like to contribute, you can submit pull requests (PRs).
Make sure to included the following with your PR:
short description of the contribution (in the Github form) docummentation of new functions, classes etc. You can also fix some the issues in the github tracker. If you decide to work on it, make sure to add a comment saying that you take it. If there was no activity for a week on a PR or an issue, please feel free to adopt it.