It looks like an open source project. Makes a hell of a lot more sense to implement using that than rolling your own? If it’s missing something you need, write it for them.

Writing your own implementation is extremely unlikely to differentiate your app/product. There is a spec, either you implement it and it works, or you don’t and it doesn’t. Using a maintained library is by far the better option.

Focus your time on the product you are building not the tech.