Filling In The Interop Packages and Rosenbrock

By: JuliaDiffEq

Re-posted from:

In the 2.0 state of the ecosystem post
it was noted that, now that we have a clearly laid out and expansive common API,
the next goal is to fill it in. This set of releases tackles the lowest hanging
fruits in that battle. Specifically, the interop packages were setup to be as
complete in their interfaces as possible, and the existing methods which could
expand were expanded. Time for specifics.