Fix Cifar10 untar problem

[avik-pal]

Fixes #11

[codecov-io]

Codecov Report

Merging #12 into master will increase coverage by 4.88%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #12      +/-   ##
==========================================
+ Coverage   36.81%   41.69%   +4.88%     
==========================================
  Files          12       12              
  Lines         747      753       +6     
==========================================
+ Hits          275      314      +39     
+ Misses        472      439      -33

Impacted Files	Coverage Δ
src/Metalhead.jl	0% <ø> (ø)	⬆️
src/datasets/autodetect.jl	73.52% <100%> (+49.28%)	⬆️
src/datasets/utils.jl	75% <0%> (+75%)	⬆️
src/datasets/cifar10.jl	80% <0%> (+80%)	⬆️

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[MikeInnes]

Cool, thanks. Can you add a test for this?

[avik-pal]

1 small problem still. I think the line run(`tar -xzvf $local_path -C $dir_path`) will fail on Windows or any non-Linux based OS. Any suggestion as to how to handle this

[Keno]

1 small problem still. I think the line run(tar -xzvf $local_path -C $dir_path) will fail on Windows or any non-Linux based OS. Any suggestion as to how to handle this

BinaryProvider can do this, but I'm gonna go with let's merge this to fix the immediate problem, and we can address Windows compatibility later.