CompatHelper: bump compat for MLUtils to 0.4, (keep existing compat)

[github-actions[bot]]

This pull request changes the compat entry for the MLUtils package from 0.3 to 0.3, 0.4. 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[bot]]

Codecov Report

Merging #252 (42c71ff) into master (2020e58) will increase coverage by 0.15%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #252      +/-   ##
==========================================
+ Coverage   80.68%   80.83%   +0.15%     
==========================================
  Files          17       17              
  Lines        1734     1701      -33     
==========================================
- Hits         1399     1375      -24     
+ Misses        335      326       -9     

Impacted Files	Coverage Δ
src/layers/basic.jl	80.43% <0.00%> (-0.82%)	:arrow_down:
src/GNNGraphs/utils.jl	74.78% <0.00%> (-0.62%)	:arrow_down:
src/GNNGraphs/convert.jl	91.50% <0.00%> (-0.33%)	:arrow_down:
src/GNNGraphs/query.jl	93.92% <0.00%> (-0.10%)	:arrow_down:
src/GNNGraphs/transform.jl	96.49% <0.00%> (-0.07%)	:arrow_down:
src/GNNGraphs/generate.jl	100.00% <0.00%> (ø)
src/GNNGraphs/sampling.jl	100.00% <0.00%> (ø)
src/layers/conv.jl	77.00% <0.00%> (+0.06%)	:arrow_up:
src/GNNGraphs/datastore.jl	73.25% <0.00%> (+0.52%)	:arrow_up:
src/GNNGraphs/gnnheterograph.jl	25.00% <0.00%> (+1.05%)	:arrow_up:
... and 1 more

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