BREAKING(yaml): remove listener option from parse() and stringify()

[iuioiua]

What's changed

The ParseOptions.listener and StringifyOptions.listener options have been removed.

Why these changes were made

These options were removed because they:

1. Are non-standard, according to the YAML 1.2 spec.
2. Seem to be barely used.
3. Add a cognitive cost in understanding @std/yaml for users.

Migration guide

This change only affects users who use these options. If you require this feature, use @std/[email protected], as this is the last version containing this feature.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.73%. Comparing base (90025e9) to head (1a6c7f8).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5224      +/-   ##
==========================================
+ Coverage   94.72%   94.73%   +0.01%     
==========================================
  Files         467      467              
  Lines       38143    38134       -9     
  Branches     5510     5507       -3     
==========================================
- Hits        36131    36127       -4     
+ Misses       1974     1969       -5     
  Partials       38       38              

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[kt3k]

This option exposes the entire LoaderState structure to the users via listener callback, which is something we don't want to consider as a public API. This removal of the option makes sense to me.

LGTM