BigInt support

[airhorns]

It'd be great to be able to serialize bigints into the sequence with a BigInt64Array or similar under the hood. I can contribute support for this if you like -- any specifics that are important for getting this right?

[allevo]

Hi!
Thanks for your interest in this project.
We haven't implemented the bigint support, but we accept PR!

So, we don't have any specification restrictions; just don't be slower if the developer doesn't use bitint at all. I'll gladly discuss the specifications before the PR to speed up the merge and the release.

[airhorns]

What do you think the best way to do it is? Should it be another parallel array buffer? Or re-use one of the existing ones?

[allevo]

DataView creation could be problematic because it introduces a performance penalty during creation.
The best approach is to leverage the existing views. But I don't know if it is doable or not.