Feature: added a range of non-standard scikit-learn performance metrics to ms.learning

[rushilg99]

Probability of significance + a collection of basic portfolio management metrics.

[codecov]

Codecov Report

Merging #1164 (057f1d9) into develop (2e1636b) will decrease coverage by 0.97%.
Report is 1 commits behind head on develop.
The diff coverage is 20.68%.

❗ Current head 057f1d9 differs from pull request most recent head 9653bed. Consider uploading reports for the commit 9653bed to get more accurate results

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1164      +/-   ##
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- Coverage    76.27%   75.30%   -0.97%     
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  Files           59       60       +1     
  Lines         4960     5046      +86     
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+ Hits          3783     3800      +17     
- Misses        1177     1246      +69     

Files	Coverage Δ
macrosynergy/learning/__init__.py	100.00% <100.00%> (ø)
macrosynergy/learning/metrics.py	18.82% <18.82%> (ø)