Typings don't work when cborg is imported in a ESM project

[Aenigma]

I'm using an ESM module project to import cborg and I got this error trying to use it from VS Code.

Could not find a declaration file for module 'cborg'. '~/projects/my-project/node_modules/cborg/esm/cborg.js' implicitly has an 'any' type.
  There are types at '~/projects/my-project/node_modules/cborg/types/cborg.d.ts', but this result could not be resolved when respecting package.json "exports". The 'cborg' library may need to update its package.json or typings.ts(7016)

I could make the error go away by changing the exports in package.json and I'm happy to PR that change, but I'm not sure what exactly best practices are in this realm.

[rvagg]

See #91, you can help test by installing [email protected] and seeing if it works for you.

[rvagg]

should be fixed by 3.0.0