Upgrade some NuGet's (Codecov, coverlet, Moq and NFluent)

[StefH]

No description provided.

[codecov]

Codecov Report

Merging #689 (21e3396) into master (71d2660) will increase coverage by 0.31%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master     #689      +/-   ##
==========================================
+ Coverage   74.27%   74.59%   +0.31%     
==========================================
  Files         148      174      +26     
  Lines        6069     6224     +155     
  Branches      645      646       +1     
==========================================
+ Hits         4508     4643     +135     
- Misses       1356     1375      +19     
- Partials      205      206       +1     

Impacted Files	Coverage Δ
...ck.Net.Abstractions/Admin/Mappings/MatcherModel.cs	100.00% <0.00%> (ø)
...Mock.Net.Abstractions/Admin/Mappings/ParamModel.cs	0.00% <0.00%> (ø)
...ck.Net.Abstractions/Admin/Mappings/MappingModel.cs	100.00% <0.00%> (ø)
...k.Net.Abstractions/Matchers/Request/MatchDetail.cs	100.00% <0.00%> (ø)
...k.Net.Abstractions/Admin/Mappings/ClientIPModel.cs	0.00% <0.00%> (ø)
...k.Net.Abstractions/Admin/Mappings/EncodingModel.cs	100.00% <0.00%> (ø)
...Mock.Net.Abstractions/Admin/Mappings/FaultModel.cs	0.00% <0.00%> (ø)
...ck.Net.Abstractions/Admin/Mappings/RequestModel.cs	100.00% <0.00%> (ø)
...ock.Net.Abstractions/Admin/Mappings/HeaderModel.cs	100.00% <0.00%> (ø)
...rc/WireMock.Net.Abstractions/Types/WireMockList.cs	91.66% <0.00%> (ø)
... and 16 more

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