projects using pug cannot be installed globally

[richRemer]

Pug Version: 2.0.4

Node Version: 10.19

Minimal steps to reproduce:

npm init -y
# change name to something unique; I used [@zingle/npm-error](https://www.npmjs.com/package/@zingle/npm-error) as a minimal example
npm publish --access all
# then switch to the root user and run:
npm install -g @zingle/npm-error      # ... or whatever package you named it

The npm command will exit with the following error:

npm WARN deprecated core-js@2.6.11: core-js@<3 is no longer maintained and not recommended for usage due to the number of issues. Please, upgrade your dependencies to the actual version of core-js@3.

> core-js@2.6.11 postinstall /usr/local/lib/node_modules/@zingle/npm-error/node_modules/core-js
> node -e "try{require('./postinstall')}catch(e){}"

Additional Comments

This makes pug completely useless for a number of reasonable use cases.

[cekvenich]

It can be installed it just has the warning.