chore: update dev and CI dependencies to latest

[bnimit]

Summary

Updates all dev/CI tooling to its latest versions, adjusts configs for the breaking changes, and drops the now-EOL Node 20. The library and example app both build, type-check, lint, and test clean on Node 22 and 24.

Package upgrades (package.json)

A fresh yarn outdated reports zero outdated direct dependencies in root and example/ after this PR.

Majors: vite 7→8 · @vitejs/plugin-react 5→6 · eslint 9→10 · eslint-config-reearth 0.3.8→0.4.0 · typescript 5.9→6 · jsdom 27→29 · vite-plugin-dts 4→5 · vite-plugin-svgr 4→5 · vite-plugin-css-injected-by-js 3→5
Minors/patches: vitest →4.1.9 · prettier →3.8.4 · postcss →8.5.15 · react/react-dom →19.2.7 · @types/react →19.2.17
Resolutions: @babel/runtime →7.29.7 · js-yaml →4.2.0
Added: @microsoft/api-extractor 7.58.9 (required peer for .d.ts bundling)
Example app: brought up from vite 3 / typescript 4.8 / @vitejs/plugin-react 2

Resolution pins intentionally held

@babel/runtime (8.0.0 available) and js-yaml (5.0.0 available) are not bumped to their new majors. They're security/dedup floors that must stay within the major their consumers require — @testing-library/* and @hello-pangea/dnd need @babel/runtime@^7, and cosmiconfig (via vite-plugin-svgr) needs js-yaml@^4. Forcing the majors would break those transitive consumers.

CI / workflows

• actions/checkout v6.0.2 → v7.0.0 (all 3 workflows; v7's only breaking change blocks fork-PR checkout for pull_request_target/workflow_run, which none of these workflows use)
• actions/setup-node v6.4.0 and peter-evans/create-pull-request v8.1.1 already latest — unchanged
• Dropped Node 20 (EOL 2026-04-30): eslint-config-reearth@0.4.0 requires Node ≥22.13. CI matrix [20.x, 22.x] → [22.x, 24.x]; release.yml setup-node 20 → 22; engines.node >=20 → >=22.13.0

Config changes required by the upgrades

Change	Why
vite.config.ts → vite.config.mts	vite-plugin-css-injected-by-js@5 is ESM-only; Vite 8 loaded the CJS-default config via require and failed. .mts forces ESM loading without making the package "type":"module" (which would break the UMD require output).
rollupTypes: true → bundleTypes: true	vite-plugin-dts@5 (now unplugin-dts) renamed the option; the old name was silently ignored, splitting types instead of bundling into one index.d.ts.
moduleResolution: "node" → "bundler" (both tsconfigs)	TS 6 errors on the deprecated node10 resolution.
example esModuleInterop: false → true	TS 6 deprecates explicitly setting it false.

Bugs surfaced & fixed

1. exports map had no types condition — modern consumers (moduleResolution: bundler/node16) couldn't resolve the library's types. Added "types" as the first export condition. (Masked before because the example used legacy node resolution.)
2. Example missing src/vite-env.d.ts — added the standard vite/client reference so CSS side-effect imports type-check.

Docs

• Fixed a stale prop name in README.md: onAlignmentChange → onAlignChange (matching GridWrapperProps), plus the missing JSX brace.
• Documented @hello-pangea/dnd as a required peer dependency in the install instructions.

Verification

Step	Root	Example
install --frozen-lockfile	✅	✅
lint	✅ (0 errors; 8 pre-existing type-import warnings, non-failing)	—
type (tsc)	✅	✅
test	✅ 6/6	—
build	✅ (.mjs + .umd.js + bundled index.d.ts)	✅

CI green on Node 22.x and 24.x.

Note: api-extractor 7.58.9 (latest) prints a harmless TypeScript 6.0.3 … is newer than the bundled compiler engine warning during .d.ts bundling. The rollup still succeeds and output is correct; it'll clear once api-extractor ships a TS 6 build.

🤖 Generated with Claude Code

[Copilot]

Pull request overview

Updates the repository’s dev tooling/CI stack to newer Node/Vite/TypeScript/ESLint generations, adjusts build/type configuration for the breaking changes, and updates docs and workflows accordingly so the library + example app build/test on Node 22/24.

Changes:

• Upgrade core dev/build dependencies (Vite 8, TS 6, ESLint 10, Vitest 4, related plugins) and adjust Vite/tsconfig settings accordingly.
• Improve package distribution metadata (add types condition in exports, new API Extractor peer for bundled d.ts) and update Node engine requirement.
• Modernize CI/workflows to use actions/checkout@v7 and drop Node 20 from the CI matrix; update example app tooling + types.

Reviewed changes

Copilot reviewed 8 out of 12 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
vite.config.mts	Switch vite-plugin-dts option to bundleTypes for v5 compatibility.
tsconfig.json	Move to TS 6-friendly moduleResolution: "bundler".
README.md	Update install instructions and fix the documented callback prop name/JSX formatting.
package.json	Add exports types condition, bump Node engine, and update dependency versions/resolutions.
example/yarn.lock	Refresh example lockfile after major toolchain upgrades.
example/tsconfig.json	TS 6 config alignment (bundler resolution, esModuleInterop: true).
example/src/vite-env.d.ts	Add Vite client types reference for correct type-checking.
example/package.json	Upgrade example app’s React/Vite/TS toolchain versions.
.github/workflows/release.yml	Update checkout action and move release workflow to Node 22.
.github/workflows/publish.yml	Update checkout action to v7.
.github/workflows/ci.yml	Drop Node 20 and update checkout action to v7.

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[Copilot]

Pull request overview

Copilot reviewed 8 out of 12 changed files in this pull request and generated no new comments.