How to Submit Changes
First, you should open up an issue or enhancement request on the Github Issue List.
Next, create your own fork of the Arcade library. The Arcade library is at:
Follow the How to Compile on how to build the code.
You can submit changes with a “pull request.” With a pull request you ask that another repository (in this case the Arcade library) “pull” your changes into the main code base.
If you aren’t familiar with how to do pull requests, the Stack Overflow discussion on pull requests is good.