Error in publishing lib as an npm package

Hi @LinusBorg, thanks for the library.

I'm trying to publish the `lib` folder as an npm directory.

what I did was to cd into the `/packages/lib` folder and then run `npm publish` from there. I got this error:
`npm ERR! Cannot set properties of null (setting 'peer')`

What could be the issue? I have reinstalled node_modules but that didn't help

Start by reproducing the reported `npm publish` command from `packages/lib` and capture the complete error context. Trace the package-publishing setup used by the repository and determine whether the issue is reproducible; done means identifying a confirmed cause and documenting the required fix or workaround.

Written by the indexing model from the issue text.