Attached is an error I’m getting when running the installer on a raspberry pi 3

Installing dependencies …
npm WARN peerDependencies The peer dependency grunt@~0.4.0 included from grunt-yamllint will no
npm WARN peerDependencies longer be automatically installed to fulfill the peerDependency
npm WARN peerDependencies in npm 3+. Your application will need to depend on it explicitly.
npm WARN peerDependencies The peer dependency stylelint@^7.6.0 included from stylelint-config-standard will no
npm WARN peerDependencies longer be automatically installed to fulfill the peerDependency
npm WARN peerDependencies in npm 3+. Your application will need to depend on it explicitly.

what is causing this and what should i do