Add types to package.json

[rarescrisan]

For typescript builds, rollup/webpack will complain about not finding a type definitions file. You have one in your project so just added it to your package.json file.

[jacobp100]

Thanks!

[MrLoh]

@jacobp100 could you make an npm release that includes this fix

[jacobp100]

Yep - can do. Just looking at this, we need to add the types file to the files list in package.json too