CI

[ArnoStrouwen]

Adding safetestsets showed some potentially unwanted interaction between tests.
f(t, y_nv, ydot_nv, user_data) is not really being used, instead it seems like a previously defined 3 argument version is doing all the work. Might want to check if that is the desired behavior.

The downstream CI might not be able to handle packages with _jll in their name, which will require an upstream fix.
There is also a deprecation message I don't quite understand.

Jacobians: Error During Test at C:\Users\arno.julia\packages\SafeTestsets\raUNr\src\SafeTestsets.jl:30
Got exception outside of a test
LoadError: p and/or t provided and are not nothing. But we
potentially detected f(du, u) or f(u). This can be caused by:

1. f(du, u) or f(u) is defined, in-which case p and/or t should not
   be supplied.
2. f(args...) is defined, in which case hasmethod can be spurious.

Currently, we perform the check for f(du, u) and f(u) first, but in
future breaking releases, this check will be performed last, which means
that if t is provided f(du, u, p, t)/f(u, p, t) will be given
precedence, similarly if p is provided f(du, u, p)/f(u, p) will be
given precedence.

But it is using NullParameters?
https://github.com/SciML/Sundials.jl/blob/master/test/common_interface/jacobians.jl#L37