For some reason, when you try to package a function that requires node-fetch the encoding module isn't found.

We need to determine if:

• This is a problem with node-fetch, or a consumption concern
• or if we are missing this dep for some reason, or if we are requiring that it exist, but it doesn't really have to.
• Decide if we make an exception for this very common scenario, or improve output when this pitfall is hit.

Examples in the wild:

• Functions not being built and packaged? netlify-lambda#142
• https://community.netlify.com/t/failed-during-stage-preparing-site-for-deployment-exit-status-1/409/2