Add a compat entry for CUDA.jl in test/Project.toml

[amontoison]

Temporary solution for #292

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (662df63) to head (7e48573).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #293   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           20        20           
  Lines         2016      2016           
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  Hits          2016      2016           

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[gdalle]

This is not a good idea, since many packages have SMC as an indirect dependency. I'd rather have our decompression be broken on GPU (no one uses it anyway) than hold back half of the ecosystem to an older version of CUDA. This should be fixed in the CUDA repo anyway, and in the meantime, I suggest we revert this PR

[amontoison]

@gdalle It is only a compat entry in the Project.toml of the tests.
Can you explain how it could hold back the ecosystem?

[amontoison]

I fixed it such that I don't break it with other modifications in SMC.jl.
I think it is still relevant to keep the tests working (if it doesn't hold back the ecosystem).

[gdalle]

Oh sorry I missed the fact that it was specific to tests. Disregard anything I said ^^