chore(deps): clear npm install deprecation warnings

[jimmyandrade]

Context

npm install prints a large set of npm warn deprecated … messages. Almost all come from a few root packages; patching leaf packages one-by-one is ineffective.

This issue inventories the warnings and maps each cluster to a remediation issue (existing or new).

Inventory (warning → pulled by → remediation)

Cluster A — netlify-cli@2.71.0 (devDependency)

Deprecated package	Path (abbrev.)	Remediation
statsd-client@0.4.5	netlify-cli → @netlify/build	#447 / #416
sourcemap-codec@1.4.8	netlify-cli → @netlify/plugin-edge-handlers → magic-string	#447 / #416
rollup-plugin-inject@3.0.2	same edge-handlers / rollup polyfills	#447 / #416
rollup-plugin-terser@7.0.2	same	#447 / #416
netlify-plugin-deploy-preview-commenting@0.0.1-alpha.16	@netlify/build	#447 / #416
node-pre-gyp@0.13.0	@vercel/nft via zip-it	#447 / #416
tar@4.4.19 / tar@6.2.1	node-pre-gyp / @mapbox/node-pre-gyp	#447 / #416
osenv@0.1.5	node-pre-gyp → nopt	#447 / #416
npmlog / are-we-there-yet / gauge	node-pre-gyp / @mapbox/node-pre-gyp	#447 / #416
moize@5 / moize@6	@netlify/build	#447 / #416
cli-ux@5 + @oclif/*	netlify-cli oclif stack	#447 / #416
debug@4.1.1 (also Gatsby)	https-proxy-agent under netlify-cli	#447 / #416

Cluster B — Gatsby 2 / webpack 4 stack (gatsby@2.32.13 + plugins)

Deprecated package	Path (abbrev.)	Remediation
urix@0.1.0 / resolve-url@0.2.1	webpack4 → micromatch → snapdragon → source-map-resolve	#448 / #415
eslint-loader@2.2.1	gatsby	#448 / #415
@hapi/joi@15 + @hapi/{hoek,topo,bourne,address}	gatsby / gatsby-plugin-offline → workbox	#448 / #415
chokidar@2.1.8	webpack-dev-server@3	#448 / #415
rimraf@2.x / glob@7.x	eslint-loader, cacache, workbox, plugins	#448 / #415
core-js@2.6.11	workbox → babel-runtime	#448 / #415
debug@4.1.1	gatsby typescript-eslint / engine.io	#448 / #415
uuid@3 (telemetry / sharp tooling)	gatsby-plugin-sharp / gatsby-cli	#448 / #415
npmlog (older)	sharp via gatsby-plugin-manifest	#448 / #415
gatsby-image@2.11.0	direct dependency (unused in src)	#446

Related blocked upgrade PRs: #421, #413, #432, #444. Long-term destination: #415 (Gatsby → Next.js).

Cluster C — Jest 26 / jsdom 16

Deprecated package	Path (abbrev.)	Remediation
request@2.88.2	jest → jsdom	#449
request-promise-native@1.0.9	same	#449
har-validator@5.1.3	request	#449

Cluster D — Material UI v4

Deprecated package	Path (abbrev.)	Remediation
popper.js@1.16.1	@material-ui/core	#436

Cluster E — other tooling (lower priority / secondary)

Deprecated package	Path (abbrev.)	Notes
uuid@8.3.2	codecov, cypress → @cypress/request	Revisit when upgrading codecov / Cypress peers; not blocking install
glob@7 / rimraf@3	@stryker-mutator/core@4	Optional: upgrade or drop Stryker if unused in CI

Acceptance criteria

• Each cluster has a dedicated remediation issue (or an existing issue that owns it)
• Cluster A → chore(deps): upgrade or remove netlify-cli to clear install deprecations #447 (and/or Migrate hosting from Netlify to Vercel #416)
• Cluster B → chore(deps): clear Gatsby 2 transitive npm deprecation warnings #448 (and/or Migrate site from Gatsby to Next.js (App Router) #415); quick win gatsby-image → chore(deps): remove unused gatsby-image dependency #446
• Cluster C → chore(deps): upgrade Jest past 26 to drop deprecated request/jsdom stack #449
• Cluster D → feat(deps): migrate Material UI v4 to MUI v5 #436
• Quick wins landed where safe (e.g. unused gatsby-image in chore(deps): remove unused gatsby-image dependency #446)
• After remediations, a fresh npm install --legacy-peer-deps no longer prints the Cluster A–D warnings above (Cluster E optional)
• Do not silence warnings with loglevel / ignore flags — fix or remove the root packages

Notes

• Prefer fixing root packages over overrides for every leaf deprecation.
• Hosting migration (Migrate hosting from Netlify to Vercel #416) naturally drops Cluster A if netlify-cli is removed from the repo.
• Framework migration (Migrate site from Gatsby to Next.js (App Router) #415) naturally drops Cluster B.

Child issues

• chore(deps): remove unused gatsby-image dependency #446 remove unused gatsby-image
• chore(deps): upgrade or remove netlify-cli to clear install deprecations #447 upgrade or remove netlify-cli
• chore(deps): clear Gatsby 2 transitive npm deprecation warnings #448 clear Gatsby 2 transitive deprecations
• chore(deps): upgrade Jest past 26 to drop deprecated request/jsdom stack #449 upgrade Jest past 26