This should not be accepted until I add a test, but I'm putting this up in case someone wants to use it.
I thought we were only updating the grackle bindings for grackle 2.0 in enzo-3.0. Did that decision change?
I interpreted @chummels's comment in the enzo-3.0 PR as deciding to add them here as well. I ended up doing this for some of my own work and just decided to issue this in case others would find it useful.
This one is fixed. I'll update the PR to Enzo-3.0 now.