Support int values for states and scenario naming

[NoahLerner]

• Add support for submitting int values for states and scenarios
• 1 and "1" are the same state/scenario
• Add unit tests

[codecov]

Codecov Report

Merging #376 into master will increase coverage by 0.03%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #376      +/-   ##
==========================================
+ Coverage   80.28%   80.32%   +0.03%     
==========================================
  Files         117      117              
  Lines        4692     4701       +9     
==========================================
+ Hits         3767     3776       +9     
  Misses        925      925

Impacted Files	Coverage Δ
src/WireMock.Net/Server/RespondWithAProvider.cs	92.98% <100%> (+1.31%)	⬆️

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[StefH]

Can you take a look at the comments?

[NoahLerner]

@StefH Removed dependency that I added accidentally