CompatHelper: bump compat for SciMLBase to 2, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the SciMLBase package from 1.90 to 1.90, 2.
This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry.
It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +8.26% 🎉

Comparison is base (0b4bf98) 87.91% compared to head (ce43eb5) 96.16%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1646      +/-   ##
==========================================
+ Coverage   87.91%   96.16%   +8.26%     
==========================================
  Files         418      418              
  Lines       34205    34229      +24     
==========================================
+ Hits        30068    32915    +2847     
+ Misses       4137     1314    -2823     

Flag	Coverage Δ
unittests	96.16% <ø> (+8.26%)	⬆️

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see 52 files with indirect coverage changes

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[sloede]

I don't understand the error. By itself, it is super unhelpful, but I also do not see why a bump in the SciMLBase version would affect this issue in the first place.

Flux v0.14 requires Julia v1.9, thus we allow also certain v0.13.x versions. However, some other requirement (which unfortunately is not shown in the error message), seems to demand Flux v0.14. If this were the case, then obviously there is an irreconcilable version conflict. However, as I said before, I don't understand where the requirement is coming from.

[ranocha]

This is a CompatHelper PR. You can see

[ Info: This is a Dependabot/CompatHelper job, so force_latest_compatible_version has been set to true

just a few lines above the error you pointed out. I just triggered a PR manually to run CI with the new version of SciMLBase.jl. Let's see whether it works there.