Export `SuperJSONValue` alongside `SuperJSONResult`

[scripthunter7]

Hi, I noticed that SuperJSONResult is exported from the library, but SuperJSONValue is not. It might be beneficial to export SuperJSONValue as well, especially for developers who want to write TypeScript wrappers around serialize and deserialize. Having access to this type would make it easier to ensure type safety and proper usage in such cases.

Would it be possible to export SuperJSONValue in a future update?

Thank you for your work on this great library!

[scripthunter7]

Seems there is a related PR already: #300