Add support for supercluster@8 (is this repo dead? 💀)

[MarkLyck]

Is your feature request related to a problem? Please describe. supercluster@8 was released with big performance improvements.

https://github.com/mapbox/supercluster/releases/tag/v8.0.0

But trying to upgrade it with react-map-gl-cluster causes the following error

Describe the solution you'd like Add support for the latest version of supercluster

I see that this repo hasn't had any commits in the last 4 years, is this dead?