Add unit tests Distributions.Discrete.Hypergeometric

[Freymaurer]

Please list the changes introduced in this PR

• testList "Distributions.Discrete.Hypergeometric" with 9 tests ✅
  • testing hypergeoCheckParam for edge case coverage
  • test all member functions of Distributions.Discrete.Bernoulli used in Distributions.Discrete.bernoulli
  • do all tests on different bernoulli distributions covering: min, max, default and nan.
• add verbose failure check hypergeoCheckParam_k + tests.
• update docs 📚
  • add example for the Sample() function
  • Change wording to be more in line with function parameters. Should improve understandability.

Additional contest

⚠️ CDF still has float as input. This is missleading and should be changed in a bigger rework of the Distribution<'a,'b> interface!

[Required] please make sure you checked that

• [x] The project builds without problems on your machine

[Optional]

• [x] Added unit tests regarding the added features

[codecov-commenter]

Codecov Report

Merging #221 (15f4188) into developer (29c23ff) will increase coverage by 0.37%. The diff coverage is 96.93%.

@@              Coverage Diff              @@
##           developer     #221      +/-   ##
=============================================
+ Coverage      41.90%   42.28%   +0.37%     
=============================================
  Files            126      126              
  Lines          13224    13311      +87     
  Branches        1784     1789       +5     
=============================================
+ Hits            5542     5628      +86     
- Misses          7224     7225       +1     
  Partials         458      458              

Impacted Files	Coverage Δ
tests/FSharp.Stats.Tests/Main.fs	0.00% <0.00%> (ø)
src/FSharp.Stats/Distributions/Discrete.fs	52.59% <87.50%> (+31.82%)	:arrow_up:
tests/FSharp.Stats.Tests/Distributions.fs	92.68% <100.00%> (-5.75%)	:arrow_down:
src/FSharp.Stats/Distributions/Continuous.fs	21.86% <0.00%> (-2.71%)	:arrow_down:

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