fix: ignore non-object options in isHexColor (#2660)

[yuna0831]

This PR fixes #2660. When isHexColor is used as a callback in Array.prototype.filter, the second argument (index) is passed as the options parameter. This fix ensures options is an object before calling the merge utility.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (c3dc37c) to head (a13b25b).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2661   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          114       114           
  Lines         2572      2574    +2     
  Branches       651       652    +1     
=========================================
+ Hits          2572      2574    +2     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[WikiRik]

Shouldn't we add the check to the merge util? That way we cover it for other validators as well. Also; can you add a test for this?

[yuna0831]

Thanks for the suggestion @WikiRik. I've refactored the fix into the merge utility and added a test for the filter use case. All 309 tests passed without linting issues. Ready for another review!"