Fix EC key compare (and test RSA eq)

[jschlyter]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 40.00000% with 6 lines in your changes missing coverage. Please review.

Project coverage is 76.32%. Comparing base (2b735fe) to head (cb0e50c).

Files with missing lines	Patch %	Lines
src/cryptojwt/jwk/ec.py	40.00%	3 Missing and 3 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #187      +/-   ##
==========================================
- Coverage   76.45%   76.32%   -0.13%     
==========================================
  Files          44       44              
  Lines        4489     4499      +10     
  Branches      841      847       +6     
==========================================
+ Hits         3432     3434       +2     
- Misses        777      781       +4     
- Partials      280      284       +4     

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