Use kong instead of kingpin

[gliptak]

#1158

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 26 lines in your changes missing coverage. Please review.

Project coverage is 28.66%. Comparing base (99d6fe4) to head (3407e64).
Report is 105 commits behind head on master.

Files with missing lines	Patch %	Lines
cmd/saml2aws/main.go	0.00%	26 Missing ⚠️

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Additional details and impacted files

@@             Coverage Diff             @@
##           master    #1360       +/-   ##
===========================================
- Coverage   42.19%   28.66%   -13.53%     
===========================================
  Files          54       70       +16     
  Lines        6456    12323     +5867     
===========================================
+ Hits         2724     3533      +809     
- Misses       3283     8319     +5036     
- Partials      449      471       +22     

Flag	Coverage Δ
unittests	28.66% <0.00%> (-13.53%)	⬇️

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