Fix cushow tests on Windows.

[maleadt]

Fixes #37

[codecov]

Codecov Report

Merging #188 into master will decrease coverage by 0.08%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #188      +/-   ##
==========================================
- Coverage   82.30%   82.22%   -0.09%     
==========================================
  Files         143      143              
  Lines        9315     9315              
==========================================
- Hits         7667     7659       -8     
- Misses       1648     1656       +8     

Impacted Files	Coverage Δ
test/device/cuda.jl	10.44% <ø> (ø)
lib/cuda/occupancy.jl	76.00% <0.00%> (-20.00%)	⬇️
deps/bindeps.jl	80.00% <0.00%> (-2.00%)	⬇️

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