Add support for TubeGeometry

[joakimunge]

Hi,

I was experimenting using this library for a project, but noticed that the TubeGeometry is not implemented.

https://threejs.org/docs/index.html?q=TubeGe#api/en/geometries/TubeGeometry

Would love if this was implemented. Will try to look into it myself, but I am not very familiar with three.js