Introduced hypothesis testing

[franflame]

Summary/Motivation:

This introduces hypothesis testing to sdoe using the hypothesis framework

Changes proposed in this PR:

• Add test function with hypothesis testing for distance.py
• Improve handling of invalid inputs in distance.py
• Add hypothesis as a developer dependency

Legal Acknowledgement

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[codecov]

Codecov Report

Patch coverage: 100.00% and project coverage change: +0.14 🎉

Comparison is base (114cbca) 34.80% compared to head (5e0e52d) 34.95%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1123      +/-   ##
==========================================
+ Coverage   34.80%   34.95%   +0.14%     
==========================================
  Files         161      161              
  Lines       36426    36432       +6     
  Branches     5950     5953       +3     
==========================================
+ Hits        12679    12735      +56     
+ Misses      22756    22715      -41     
+ Partials      991      982       -9     

Impacted Files	Coverage Δ
foqus_lib/framework/sdoe/distance.py	92.59% <100.00%> (+2.11%)	⬆️

... and 13 files with indirect coverage changes

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[sotorrio1]

LGTM