I had this message while installing. There are no longer maintained pkgs used.

[pwnspirit]

here is the output.

 ~   doas npm install -g learnyounode
npm WARN deprecated @hapi/bourne@1.3.2: This version has been deprecated and is no longer supported or maintained
npm WARN deprecated @hapi/topo@3.1.6: This version has been deprecated and is no longer supported or maintained
npm WARN deprecated colors-tmpl@1.0.0: no longer maintained
npm WARN deprecated @hapi/address@2.1.4: Moved to 'npm install @sideway/address'
npm WARN deprecated @hapi/hoek@8.5.1: This version has been deprecated and is no longer supported or maintained
npm WARN deprecated @hapi/joi@15.1.1: Switch to 'npm install joi'

changed 169 packages, and audited 170 packages in 21s

10 packages are looking for funding
  run `npm fund` for details

6 vulnerabilities (3 moderate, 3 high)

To address all issues (including breaking changes), run:
  npm audit fix --force

Run `npm audit` for details.