Thank you for your interest in contributing!
All contributions are welcome, might it be a simple fix of a typo or the rewrite of an entire module.
Before working on the change, check if there is already somebody working on the problem (Search issues or look through the commits/code).
Please try to match the coding style as closely as possible by looking at the existing at the code.
If you are not sure about something, simply create a new issue. The PR does not need to be perfect at first as it can be reviewed and improved!
All contributors will be credited in the README.