If you want to contribute -Thank you ! :D- there are several ways to do it.
You can check in the issues if some bugs remain open. If you discover one you can obviously fix it and send a pull request
If you have an idea for a new feature, please create an new issue with the tag enhancement.
We will quickly take a look at it and together plan the directives for the development.
Some issues can be developed by external people like you, so check out the existing issue with the label contribute !
Whenever you decide to contribute something related to an issue, please comment it and link to your fork, so that people can also join you.
"Hey I'm gonna take this issue help is welcome at <link_to_your_fork>!"
If you know us Loïc Touzard or Paul Dautry, you can contact us directly. We can also have a discussion in the issues' and pull requests' comments
Please refer to the guidelines if you want to contribute, that may help you to use fork and pull request feature correctly. Try to respect the same style while coding, adapat to what's around.
Take a look at the Hacktoberfest ! People beginning with contributing on Github are welcome too !