How to contribute to jQuery?

How to contribute to jQuery?

I am a front end developer with a lot of JavaScript and a little jQuery experience. Could someone advise the best way to get involved with jQuery and make a contribution? Is it best to work on bug fixes, testing, something else?

A little information on this arena would be appreciated (with links if possible) as I would like to help in some way but I am just not sure how to start. Thanks.