fix: add types to package.json exports map

[stefanprobst]

when using ts with "module": "nodenext" / "bundler", the types field is expected on exports in package.json.

[what-the-diff]

PR Summary

• Introduction of TypeScript Types
  The update in the package.json file includes the addition of a new property, specifically for TypeScript types. This change means our code is now more robust and less error-prone, improving the quality of our application. This property points to a file that holds these type definitions, making it easier for developers to understand the structure and objects they're working with.

[pi0]

LGTM btw Have you tried checked package with https://arethetypeswrong.github.io/ ?

[stefanprobst]

Have you tried checked package with https://arethetypeswrong.github.io/ ?

haven't heard of that before, thanks for the link!

[ineshbose]

Good spot - thank you! 😄