fix: type definition files in exports field (fix #1398)

[black7375]

Please check if the PR fulfills these requirements

• It's the right issue type on the title
• When resolving a specific issue, it's referenced in the PR's title (e.g. fix #xxx[,#xxx], where "xxx" is the issue number)
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Description

See #1398
I'm currently using a patched version of the package and it works fine.

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Thank you for your contribution to TOAST UI product. 🎉 😘 ✨

[jcable]

FYI This patch works for me for React.

[Tragio]

Hi @adhrinae 👋

Is there any ETA to merge these pending PRs and release a new version?

Thank you for your awesome work 🚀

[adhrinae]

@Tragio

Thanks for the kind words. But I cannot say anything since I'm not a maintainer anymore.

[Tragio]

@adhrinae thank you very much for your reply. Hope you're enjoying your new adventures 🙏

Perhaps @blacktoast, @lja1018? 🤔