Fix missing TypeScript declarations in published package

[stevenocchipinti]

When a codebase uses v9.7.11 (and likely other versions too) an error is produced when importing markdown-to-jsx in a TypeScript project:

error TS7016: Could not find a declaration file for module 'markdown-to-jsx'.

Refer to issue #849.

Root cause

(According to AI)

UNICODE_PUNCT_R and UNICODE_WHITESPACE_R in utils.ts were exported var declarations without explicit type annotations. The build tool (@bunup/dts) uses oxc-transform's isolatedDeclaration() to generate .d.ts files, which requires all exported bindings to have explicit types — without them it emits TS9010 errors.

In CI these errors are fatal (process.exit(1) is called before any .d.ts files are written), so the published package ships without declarations. Locally the errors are non-fatal warnings, which is why the build appears to succeed.

The fix

Add : RegExp type annotations to both variables — two characters of change each.

Verification

The CI=true variable needs to be set to see the problem locally:

git checkout main
bun run build           # succeeds locally (misleading)
CI=true bun run build   # fails, no .d.ts files written

Once the type annotations have been added, it passes.

git checkout fix-typescript
CI=true bun run build           # succeeds locally

AI disclosure

Just a heads up, I used AI to find and implement this solution but did my own testing to prove that it works.

The tests are all passing either way and I've tested using this package in my own repo that was otherwise failing via yalc.

[changeset-bot]

🦋 Changeset detected

Latest commit: 56f27dd

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
markdown-to-jsx	Patch

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[stevenocchipinti]

Just added a changeset after seeing that message... let me know if that's not enough detail for the md file

[quantizor]

Thank you!