Hi

First of all, thanks for maintaining this project.

I noticed that the package currently does not provide TypeScript type definitions. Because of this, editors such as VS Code cannot provide proper IntelliSense, autocomplete, or type checking when using the library in TypeScript projects.

Even though the project itself is written in JavaScript, adding .d.ts declaration files would greatly improve the developer experience for TypeScript users.

I'd be happy to work on a PR for this if you're open to it.

Thanks!