fix: mark form dirty when object keys are deleted

[evpaassen]

🔎 Overview

This PR fixes an issue where removed keys of objects in field values don't mark the form as dirty, because the isEqual method is not commutative. Please refer to this comment for a demonstration of the issue: https://github.com/logaretm/vee-validate/issues/4678#issuecomment-2015075349.

I read that a changeset was desired when submitting a PR, but I'm unsure what to include. Please advise.

✔ Issues affected

closes #4678

(Also credits to @SCBosch)

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 89.90%. Comparing base (2a0881f) to head (b83365b).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4710      +/-   ##
==========================================
+ Coverage   89.87%   89.90%   +0.02%     
==========================================
  Files          93       93              
  Lines        7676     7695      +19     
  Branches     1360     1367       +7     
==========================================
+ Hits         6899     6918      +19     
  Misses        770      770              
  Partials        7        7              

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