Option for changing h/j/k/l keys for navigation

[oiiiiiiii]

Hi,

currently there seems to be no option to change the binding for h / . Since I don't use hjkl for navigation I would like to map it to something else.

If you give me a rough outline one how you would want it to be implemented (if you want the option even) I could also try create a PR myself

Thanks for your awesome work! :)