🔧 Update Node >=22 and npm >=11

[stoe]

Summary

Bump the required runtime engines to modern versions:

• Node.js: >=22
• npm: >=11

What Changed

• Updated package.json engines field from the previous lower requirements to {"node": ">=22", "npm": ">=11"}.
• No production source code changes.
• No dependency additions/removals as part of this PR (tooling-only engines metadata update).

Rationale

Node 22 provides:

• Stable, up-to-date V8 with performance & security improvements.
• Enhanced ESM stability and loader behavior beneficial for this CLI (the project is type: module).
• Longer support window; reduces maintenance burden for older Node lines.
• Alignment with current GitHub-hosted runners (Node 22 now broadly available) and simplifies CI matrix.

Raising npm to 11 ensures compatibility with lockfile format / workspace and provenance improvements.

Verification

• Local install under Node 22 succeeds without warnings about engine mismatch.
• Test suite passes (npm test).
• Lint passes (npm run pretest).
• CLI smoke test (invoking ./cli.js --help) works under Node 22.

Impact / Risk

• Users running Node <22 will receive an engines warning (or potential install block if their tooling enforces engines). This is intentional.
• No functional change for users already on Node 22.
• Very low risk: Only metadata updated.

Migration Guidance

If a consumer is on Node 20, upgrade via nvm:

nvm install 22
nvm use 22

Or with volta:

volta install node@22

Possible Follow-Ups (Optional)

• Update CI matrix to test only Node 22 (and maybe 23/nightly for early warnings).
• Document minimum Node version in readme.md usage section.
• Remove any polyfills targeting older Node if present (none identified yet).

Release Note

Chore: require Node >=22 and npm >=11.

Checklist

• Engines field updated
• Tests pass on Node 22
• Lint passes
• No runtime code changes

Let me know if you’d like CI updates bundled here or in a follow-up PR.

[Copilot]

Pull Request Overview

Updates the minimum Node.js and npm version requirements in package.json from Node >=20 and npm >=10 to Node >=22 and npm >=11.

• Updated Node.js engine requirement from >=20 to >=22
• Updated npm engine requirement from >=10 to >=11

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