feat: add default and named export

[climba03003]

Fixes: #169
add default and named export.

Checklist

• run npm run test and npm run benchmark
• tests and/or benchmarks are included
• documentation is changed or added
• commit message and code follows the Developer's Certification of Origin
  and the Code of conduct

[mcollina]

lgtm

[climba03003]

@mcollina should we consider this as minor or patch? both are suitable in my mind.
It fix the export and TypeScript mismatch problem.
It also provide more support on different import style.

[mcollina]

patch is totally ok! Could you do the honors?

[climba03003]

patch is totally ok! Could you do the honors?

Sure, I will release it as patch