Use kong instead of kingpin

[gliptak]

#1158

[codecov-commenter]

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Codecov Report

:x: Patch coverage is 0% with 26 lines in your changes missing coverage. Please review. :white_check_mark: Project coverage is 29.06%. Comparing base (958e9b1) to head (b7c2e68). :warning: Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
cmd/saml2aws/main.go	0.00%	26 Missing :warning:
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Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1360      +/-   ##
==========================================
+ Coverage   28.09%   29.06%   +0.97%     
==========================================
  Files          70       70              
  Lines       12545     9665    -2880     
==========================================
- Hits         3524     2809     -715     
+ Misses       8544     6380    -2164     
+ Partials      477      476       -1     

Flag	Coverage Δ
unittests	29.06% <0.00%> (+0.97%)	:arrow_up:

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