Allow customised pubKeyCredParams

[abergs]

This fixes #533.

[abergs]

@aseigler Let me know if you think this looks good.

This allows devs to customise what algo's they want to support when creating the options. By default it's the same list as before, minus RS1.

In conformance testing we added RS1 to the list.

I've run it through conformance and it passes.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 11.11111% with 16 lines in your changes missing coverage. Please review.

Project coverage is 76.01%. Comparing base (1c003bf) to head (6dddf89).
Report is 2 commits behind head on master.

Files with missing lines	Patch %	Lines
Src/Fido2.Models/CredentialCreateOptions.cs	12.50%	14 Missing ⚠️
Src/Fido2/Fido2.cs	0.00%	1 Missing ⚠️
Src/Fido2/RequestNewCredentialParams.cs	0.00%	1 Missing ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #579      +/-   ##
==========================================
- Coverage   76.03%   76.01%   -0.03%     
==========================================
  Files         101      101              
  Lines        2600     2627      +27     
  Branches      432      438       +6     
==========================================
+ Hits         1977     1997      +20     
- Misses        513      517       +4     
- Partials      110      113       +3     

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[aseigler]

@aseigler Let me know if you think this looks good.

This allows devs to customise what algo's they want to support when creating the options. By default it's the same list as before, minus RS1.

In conformance testing we added RS1 to the list.

I've run it through conformance and it passes.

We had talked about this before, looks good to me!