Bump isort hook version

[charlesbluca]

Bumps the isort pre-commit hook to 5.6.4 to correspond with the version bump in gpuCI.

[pentschev]

LGTM, thanks @charlesbluca !

[codecov-commenter]

Codecov Report

Merging #682 (a147ac2) into branch-21.10 (c04856e) will increase coverage by 2.48%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           branch-21.10     #682      +/-   ##
================================================
+ Coverage         87.83%   90.31%   +2.48%     
================================================
  Files                15       15              
  Lines              1652     1652              
================================================
+ Hits               1451     1492      +41     
+ Misses              201      160      -41     

Impacted Files	Coverage Δ
dask_cuda/explicit_comms/dataframe/shuffle.py	98.69% <0.00%> (+0.65%)	⬆️
dask_cuda/proxy_object.py	90.73% <0.00%> (+1.08%)	⬆️
dask_cuda/utils.py	88.99% <0.00%> (+1.37%)	⬆️
dask_cuda/cli/dask_cuda_worker.py	97.14% <0.00%> (+1.42%)	⬆️
dask_cuda/device_host_file.py	71.77% <0.00%> (+1.61%)	⬆️
dask_cuda/initialize.py	92.59% <0.00%> (+3.70%)	⬆️
dask_cuda/proxify_device_objects.py	95.72% <0.00%> (+6.83%)	⬆️
dask_cuda/get_device_memory_objects.py	87.50% <0.00%> (+19.44%)	⬆️
dask_cuda/is_device_object.py	88.88% <0.00%> (+25.92%)	⬆️

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[pentschev]

@gpucibot merge

[jakirkham]

@gpucibot merge