CompatHelper: bump compat for CUDA to 4, (keep existing compat)

[github-actions]

This pull request changes the compat entry for the CUDA package from 1, 2, 3 to 1, 2, 3, 4.
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

Base: 88.09% // Head: 62.40% // Decreases project coverage by -25.69% ⚠️

Coverage data is based on head (987cd0d) compared to base (7b9aa21).
Patch has no changes to coverable lines.

Additional details and impacted files

@@             Coverage Diff             @@
##           master      #71       +/-   ##
===========================================
- Coverage   88.09%   62.40%   -25.69%     
===========================================
  Files          33       33               
  Lines        2545     2434      -111     
===========================================
- Hits         2242     1519      -723     
- Misses        303      915      +612     

Impacted Files	Coverage Δ
src/networks/invertible_network_hyperbolic.jl	0.00% <0.00%> (-97.50%)	⬇️
...rc/networks/invertible_network_conditional_hint.jl	0.00% <0.00%> (-95.13%)	⬇️
src/networks/invertible_network_irim.jl	0.00% <0.00%> (-92.21%)	⬇️
src/networks/invertible_network_glow.jl	0.00% <0.00%> (-90.00%)	⬇️
src/networks/invertible_network_hint_multiscale.jl	0.00% <0.00%> (-83.34%)	⬇️
...rc/networks/invertible_network_conditional_glow.jl	0.00% <0.00%> (-82.90%)	⬇️
.../invertible_network_conditional_hint_multiscale.jl	0.00% <0.00%> (-79.32%)	⬇️
src/utils/dimensionality_operations.jl	75.14% <0.00%> (-20.56%)	⬇️
src/conditional_layers/conditional_layer_glow.jl	88.63% <0.00%> (-9.10%)	⬇️
src/utils/compute_utils.jl	60.00% <0.00%> (-6.67%)	⬇️
... and 10 more

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