Sorting of imports

[hoxbro]

I'm using the black style for sorting imports. There are likely a lot of opinions on the best way to do it.

[codecov-commenter]

Codecov Report

Merging #5937 (be29819) into main (53f816e) will decrease coverage by 0.01%.
The diff coverage is 97.86%.

@@            Coverage Diff             @@
##             main    #5937      +/-   ##
==========================================
- Coverage   88.58%   88.58%   -0.01%     
==========================================
  Files         313      313              
  Lines       65100    65066      -34     
==========================================
- Hits        57668    57636      -32     
+ Misses       7432     7430       -2     

Flag	Coverage Δ
ui-tests	23.25% <93.16%> (-0.04%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
holoviews/annotators.py	86.26% <100.00%> (ø)
holoviews/core/__init__.py	100.00% <100.00%> (ø)
holoviews/core/accessors.py	83.91% <100.00%> (ø)
holoviews/core/boundingregion.py	62.42% <100.00%> (ø)
holoviews/core/data/__init__.py	86.53% <100.00%> (ø)
holoviews/core/data/array.py	83.41% <100.00%> (ø)
holoviews/core/data/cudf.py	19.10% <ø> (ø)
holoviews/core/data/dictionary.py	90.90% <100.00%> (ø)
holoviews/core/data/grid.py	86.27% <100.00%> (ø)
holoviews/core/data/ibis.py	82.01% <100.00%> (ø)
... and 251 more

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