What should I do for deprecated npm modules for express generator?

express website

npm WARN deprecated jade@1.11.0: Jade has been renamed to pug, please install the latest version of pug instead of jade
npm WARN deprecated transformers@2.1.0: Deprecated, use jstransformer

(I am just following a tutorial.) Is installing jstransformer and pug will be not enough? Am I supposed to edit code of express? Can I use something like this for production?

I don't understand how deprecation work and what to do about it.

via xzxc