Move to Julia 1.9, use extensions remove Requires for `collect_results` and Dataframes

[Datseris]

The title says it all, currently we use Requires for collect_results. We should not do that as Julia natively supports conditional dependencies via the extensions. See here for how to do it: https://pkgdocs.julialang.org/dev/creating-packages/#Conditional-loading-of-code-in-packages-(Extensions)

[denfc]

We should not do that

Via PkgDependency, I see that DrWatson v2.15.0. still uses Requires. Is an update on the way or should I learn to implement conditional dependencies? If the latter, could you post the code you use?

Thanks!

-- dfc

[Datseris]

https://pkgdocs.julialang.org/v1/creating-packages/#Conditional-loading-of-code-in-packages-(Extensions)

[Datseris]

this has the code/instructions for how to do it.