Is it possible to update the configuration of a function without deploy all stack serverless.yml?

When I merge a feature to my staging or master branch, I always need to deploy the whole stack which is long, a hassle, have to wait the end of the deployment to see if there is an error, and it drawn a lot of compute power of our mac.

So is there a possible solution to only deploy function, test out the correct configuration, without waiting 1h to deploy the whole stack ?