PR-62: Fix issue shallow outliers fails to initialize

[PRodriguezFlores]

• Fixed an issue where the shallow outliers wouldn't initialize properly in the API REST because it was not converting some values from the config to float.
• Included a test so this doesn't happen again.

[the-label-bot]

The Label Bot has predicted the following:

Category	Value	Confidence	Applied Label
Kind	bug	0.992	✔️
Size	S	0.968	✔️

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.35%. Comparing base (8bed888) to head (458f6ab).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #73   +/-   ##
=======================================
  Coverage   83.35%   83.35%           
=======================================
  Files          13       13           
  Lines         769      769           
=======================================
  Hits          641      641           
  Misses        128      128           

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