Callbacks estimator and LogbookSaver

[rodrigo-arenas]

This PR implements;

• Added the parameter estimator to all the functions on the module sklearn_genetic.callbacks

• Implemented the callback LogbookSaver which saves the estimator.logbook object with all the fitted hyperparameters and their cross-validation score

• Includes tests and docs

[codecov[bot]]

Codecov Report

Merging #19 (d97ad6a) into master (a000e3c) will increase coverage by 0.00%. The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master      #19   +/-   ##
=======================================
  Coverage   99.79%   99.80%           
=======================================
  Files          13       13           
  Lines         489      505   +16     
=======================================
+ Hits          488      504   +16     
  Misses          1        1           

Impacted Files	Coverage Δ
sklearn_genetic/genetic_search.py	99.40% <ø> (ø)
sklearn_genetic/algorithms.py	100.00% <100.00%> (ø)
sklearn_genetic/callbacks.py	100.00% <100.00%> (ø)
sklearn_genetic/plots.py	100.00% <100.00%> (ø)

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