Update tests

[abhro]

No description provided.

[abhro]

For some of the Aqua.jl test failures: CompatHelper has also been silently failing as an action?

[abhro]

For the jdcnv type piracy issue raised by Aqua.jl, Dates.datetime2julia only provides one method (at the time of writing). Would it be a bad idea to replace

const jdcnv = Dates.datetime2julian

with

jdcnv(d) = Dates.datetime2julian(d)

so then these are two different functions, and

jdcnv(date...) = jdcnv(DateTime(date...))

still works as an un-pirated method?

[cgarling]

Sounds reasonable to me

[giordano]

Doctests are failing nightly. I'm not really sure it's a good idea to test them with all versions, since you have to deal with floating point results which can fluctuate.