RequestMessageParamMatcher supports Ignore Case for the key

[StefH]

#253

[codecov]

Codecov Report

Merging #254 into master will decrease coverage by 0.15%.
The diff coverage is 83.05%.

@@            Coverage Diff             @@
##           master     #254      +/-   ##
==========================================
- Coverage   89.88%   89.72%   -0.16%     
==========================================
  Files         102      103       +1     
  Lines        5099     5121      +22     
==========================================
+ Hits         4583     4595      +12     
- Misses        516      526      +10

Impacted Files	Coverage Δ
src/WireMock.Net/RequestBuilders/Request.cs	97.12% <ø> (-0.37%)	⬇️
src/WireMock.Net/Admin/Mappings/ParamModel.cs	0% <0%> (ø)	⬆️
src/WireMock.Net/Server/FluentMockServer.Admin.cs	86.45% <100%> (+0.01%)	⬆️
...Net/Matchers/Request/RequestMessageParamMatcher.cs	100% <100%> (ø)	⬆️
src/WireMock.Net/RequestMessage.cs	96.96% <100%> (+0.06%)	⬆️
src/WireMock.Net/Serialization/MappingConverter.cs	100% <100%> (ø)	⬆️
src/WireMock.Net/RequestBuilders/Request.Params.cs	80% <80%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 62550b6...92097dc. Read the comment docs.