build(deps/dev): bump tsdown from 0.21.7 to 0.22.0

[dependabot]

Bumps tsdown from 0.21.7 to 0.22.0.

Release notes

Sourced from tsdown's releases.

v0.22.0

   🚨 Breaking Changes

• Drop Node.js < 22.18.0 support, make unrun optional, add tsx config loader  -  by @​sxzz (a1042)
• dts: Auto-enable dts when tsconfig declaration is true  -  by @​sxzz in rolldown/tsdown#872 (085f0)
• publint: Use pkg from publint results, require publint v0.3.8+  -  by @​sxzz (413bb)

   🚀 Features

• Upgrade rolldown to 1.0.0-rc.18  -  by @​sxzz (66085)
• Upgrade rolldown to v1.0.0  -  by @​sxzz (fabba)
• exports: Auto-enable bin detection by default  -  by @​sxzz in rolldown/tsdown#873 (abda9)

   🐞 Bug Fixes

• Explicitly drop node 23 support  -  by @​sxzz (85e65)
• debug: Enhance debug logging for pack tarball  -  by @​sxzz and Copilot (5de04)
• exports: Detect types fields nested in conditional exports  -  by @​sxzz (82fa1)
• pkg: Fix duplicate configuration warning logic  -  by @​ho991217 and @​sxzz in rolldown/tsdown#935 (6a0d9)

🔄 Migration Guide

Node.js version

Upgrade to Node.js 22.18.0 or later. Bun and Deno remain supported (experimental).

unrun is no longer bundled

If your environment relies on the unrun config loader (i.e. you're on a Node version without native TypeScript support and use the default auto loader), install it manually:

npm i -D unrun
# or, alternatively, the new tsx loader:
npm i -D tsx

If you use Node.js 22.18.0+ with native TypeScript support, no change is needed — the auto loader will pick native.

dts auto-enabled from tsconfig

If your tsconfig.json has compilerOptions.declaration: true but you do not want tsdown to emit .d.ts files, opt out explicitly:

// tsdown.config.ts
export default defineConfig({
  dts: false,
})

exports.bin auto-detection

... (truncated)

Commits

• e3b454b chore: release v0.22.0
• 809fada docs: remove rolldown warning from getting started
• fabbabf feat: upgrade rolldown to v1.0.0
• 3e41fe3 ci: add node 26 to test matrix
• 6a0d98c fix(pkg): fix duplicate configuration warning logic (#935)
• 85e65d8 fix: explicitly drop node 23 support
• a0f3a08 chore: release v0.22.0-beta.3
• 1380ef4 chore: upgrade deps
• 8f07cae v0.22 (#931)
• b001818 chore: upgrade deps
• Additional commits viewable in compare view

[dependabot]

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