Yes, v2.8.0 of NodeCanvas will work well with v2.8.0 of FlowCanvas.
I always submit both packages at exactly the same time so that they get published at the same time as well, which had been the case until now.
For some reason though this time, the Unity Asset Store team, decided to publish FlowCanvas first without publishing new version of NodeCanvas as well. Hopefully NC 2.8.0 will also be approved shortly.