Matteo Cusini

> Anyone volunteer to do this work? I can take care of upgrading our CI ubuntu builds. Let us decide what exactly we want though. For CPU builds we currently...

> > I think it seems to be working > > Champagne 🍾 > > Can you update the description of the PR with what you've been doing and then...

> For now I am unsure though how to factor up this > > https://github.com/GEOS-DEV/GEOS/blob/6919bfb04393cae7ff7a336a5ae635dbd2118f59/src/coreComponents/finiteVolume/FaceElementToCellStencil.hpp#L244-L263 > > As unlinke halfWeight in TPFA, the treatment is non-symmetrical for `t0` and `t1`...

This PR needs one more review.