Use capitalised key as a layer switch

[JonnySB]

Hi there, I love this project - thanks for all that you do!

This could quite possibly be a skill issue and something I have missed, however, my config requires that I am able to trigger a layer using both the lowercase and uppercase version of a key. Essentially this is because the caps_lock key for me is on a layer, and so I need to be able to access that layer using a capitalised version of the key to turn it off.

Firstly, is this possible? And if not, it would be a great feature to add!