[JasonPaff]

Summary

Brings the repo's tooling up to date after ~a year. Stacked on #151 — this branch includes those commits, so it should merge after Next 16 support lands (I'll rebase if needed).

Tool	Before	After
pnpm	7.33.7	11.9.0
TypeScript	5.1.3	6.0.3
tsup	7.1.0	8.5.1
Vitest	0.32.4	4.1.9
ESLint	8.x + .eslintrc.cjs	10.x + flat eslint.config.mjs
typescript-eslint	5.x plugin/parser	8.x unified package
CI Node	20	22 (pnpm 11 requires ≥22.13)

Notable details

• prettier and turbo are now pinned ranges instead of "latest", so fresh installs can't silently change formatting or build behavior
• pnpm 11 supply-chain features are configured in pnpm-workspace.yaml: dependency build scripts are allowlisted (esbuild, sharp, unrs-resolver)
• tsup injects baseUrl into its dts build, which TS 6 rejects as deprecated (TS5101); ignoreDeprecations: "6.0" is scoped to the dts options in tsup.config.ts only — remove once tsup stops injecting it
• Vitest 4 made vite a peer dependency; without an explicit root vite, pnpm satisfied it with the docs site's vite 4 and vitest failed to start — root now declares vite ^8
• typescript-eslint 8 surfaced four minor issues, fixed behavior-neutrally: an unused catch binding in cli.ts, and unknown | unknown[] return types in utils.ts that collapse to unknown. Patch changeset included since these touch published source
• The older example apps (custom-filename on Next 13.4, with-config on Next 15) intentionally keep their pinned TypeScript versions as backward-compat coverage
• Root engines bumped to >=22.13; @types/node, @manypkg/cli, pkg-pr-new refreshed

Docs site (Astro 2) deliberately untouched — that's a separate effort.

Verification

• Full turbo pipeline passes: build, lint, typecheck, test (144 tests)
• All four example apps build (Next 13.4 / 15 / 16 pages / 16 app)
• Both workflows use pnpm/action-setup@v4 which reads packageManager, so CI picks up pnpm 11 with no further changes

[✅] (if ready to be merged) Yes I have made a changeset

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[pkg-pr-new]

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npm i https://pkg.pr.new/next-typesafe-url@152

commit: 42197dd