fix(flatten): added option to skip automatic camel-case

[fredbi]

• contributes Flatten changes case on definitions go-swagger/go-swagger#2334

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (a50691f) 83.32% compared to head (fe57b5a) 83.37%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #88      +/-   ##
==========================================
+ Coverage   83.32%   83.37%   +0.04%     
==========================================
  Files          14       14              
  Lines        2483     2490       +7     
==========================================
+ Hits         2069     2076       +7     
  Misses        364      364              
  Partials       50       50              

Flag	Coverage Δ
oldstable	83.37% <100.00%> (+0.04%)	⬆️
stable	83.37% <100.00%> (+0.04%)	⬆️

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