fix(sendNoContent): preserve custom status code if already set

[wolodev]

🔗 Linked issue

Resolves #560

❓ Type of change

• 📖 Documentation (updates to the documentation, readme, or JSdoc annotations)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality like performance)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

Resolves #560
setResponseStatus didn't work when no content was returned from eventHandler

📝 Checklist

• [ X] I have linked an issue or discussion.
• I have updated the documentation accordingly.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (7a8209b) 83.83% compared to head (395bdfe) 83.85%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #577      +/-   ##
==========================================
+ Coverage   83.83%   83.85%   +0.02%     
==========================================
  Files          31       31              
  Lines        3563     3568       +5     
  Branches      543      547       +4     
==========================================
+ Hits         2987     2992       +5     
  Misses        576      576              

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[pi0]

Thanks