I would like to keep all other package versions in tact, but upgrade one single package to the most recent version. How can I do that using yarn?

I know I can delete yarn.lock, and then run `yarn install`, but I think that will upgrade *every* package, which I don't want. I just want the most recent version of `node-sass`, and for that to override the version I have in `yarn.lock`.

How can this be done?