update to Julia 1.0?

[stevengj]

Any chance of an update to be compatible with Julia 1.x? I'd be willing to help with this; #10 already updates to Julia 0.6 if that can be merged, and then one would update to Julia 0.7.

[ChrisRackauckas]

Most of these methods were implemented in https://github.com/SciML/ExponentialUtilities.jl . That is in some sense a spiritual successor to this library as the the method here was used as a starter code, but a lot of extensions were added from there (certain numerical stability tweaks from papers like KIOPS).

[stevengj]

I thought that ExponentialUtilities was based on Krylov methods, which are different from the Al-Mohy and Higham algorithm implemented in this package. It would be nice to still have the latter algorithm even if only for comparison purposes.

[ChrisRackauckas]

For some reason I thought this was ExpoKit.