cannot use `import from 'approximate-number'`

[filipgutica]

[nfriedly]

Yeah, I think this library completely predates import and export.

If you want to open a PR that either adds an ESM wrapper or else converts the library over to ESM entirely, I'd appreciate it.

I have a slight preference for the wrapper option due to better backwards compatibility, but we can just call it 3.x if we change everything over.