update flake8, black and isort to set line length limit to 79

[ycexiao]

Closes #324

[ycexiao]

@sbillinge It's ready for review

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (9d7b804) to head (f4aebe8).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #326   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            9         9           
  Lines          516       516           
=========================================
  Hits           516       516           

Files with missing lines	Coverage Δ
tests/conftest.py	100.00% <100.00%> (ø)
tests/test_diffraction_objects.py	100.00% <100.00%> (ø)
tests/test_loaddata.py	100.00% <100.00%> (ø)
tests/test_resample.py	100.00% <ø> (ø)
tests/test_serialization.py	100.00% <100.00%> (ø)
tests/test_tools.py	100.00% <100.00%> (ø)
tests/test_transforms.py	100.00% <100.00%> (ø)

[sbillinge]

Thanks, that was a big one on the end but we'll with doing