test(yaml): test sortKeys option behavior

[kt3k]

This PR adds test cases that check the behavior of sortKeys option of stringify.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 96.46%. Comparing base (ff2f1f1) to head (51fbc6e).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5523      +/-   ##
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+ Coverage   96.44%   96.46%   +0.01%     
==========================================
  Files         465      465              
  Lines       37714    37714              
  Branches     5573     5574       +1     
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+ Hits        36374    36380       +6     
+ Misses       1298     1291       -7     
- Partials       42       43       +1     

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[iuioiua]

I don't see a good reason for YAML to handle this functionality. Rather, this seems like something that should be done to the data before stringification. In other words, I suggest removing this option. WDYT?

[kt3k]

The key order of Object is not easily controllable in JavaScript (Even inconsistent across runtimes). See the discussion in https://stackoverflow.com/questions/5525795/does-javascript-guarantee-object-property-order