Refactoring - Violin plots - And more

[trevismd]

This version comes with a lot of changes:

• a change of API for
  • A clear separation of annotations generation and adding to plot (See https://github.com/webermarcolivier/statannot/issues/55)
  • Increased user code reusability as it is not necessary to rewrite all the call parameters to have the same behavior in multiple successive plots
  • a focus on reducing function complexity for improved readability and maintainability and to encourage contributions
  • Support for violinplots (#8)
  • Fixes: printed legend for star notation (#17) and a bug when providing a dataframe with categories as different columns.

Unit and integration tests as well as sphinx documentation are also added.

[codecov[bot]]

Codecov Report

Merging #16 (1b476a3) into master (c4d8f9a) will increase coverage by 33.61%. The diff coverage is 93.50%.

@@             Coverage Diff             @@
##           master      #16       +/-   ##
===========================================
+ Coverage   61.15%   94.76%   +33.61%     
===========================================
  Files          17       22        +5     
  Lines         852     1508      +656     
===========================================
+ Hits          521     1429      +908     
+ Misses        331       79      -252     

Impacted Files	Coverage Δ
statannotations/Annotator.py	87.47% <87.47%> (ø)
statannotations/format_annotations.py	93.54% <90.00%> (+48.38%)	:arrow_up:
statannotations/stats/ComparisonsCorrection.py	90.36% <90.00%> (+1.79%)	:arrow_up:
statannotations/PValueFormat.py	98.76% <98.76%> (ø)
statannotations/__init__.py	100.00% <100.00%> (ø)
statannotations/_version.py	100.00% <100.00%> (ø)
statannotations/stats/StatResult.py	90.69% <100.00%> (ø)
statannotations/stats/StatTest.py	100.00% <100.00%> (+35.29%)	:arrow_up:
statannotations/stats/test.py	100.00% <100.00%> (ø)
statannotations/stats/utils.py	100.00% <100.00%> (+62.96%)	:arrow_up:
... and 21 more

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