feat: add response header argument in EventOpenFunc #1060

[yoogoc]

close: #1060

[jeevatkm]

@yoogoc Thanks for updating the PR.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 99.85%. Comparing base (ed398ef) to head (aa70db6).
⚠️ Report is 1 commits behind head on v3.

Additional details and impacted files

@@           Coverage Diff           @@
##               v3    #1073   +/-   ##
=======================================
  Coverage   99.85%   99.85%           
=======================================
  Files          18       18           
  Lines        3430     3430           
=======================================
  Hits         3425     3425           
  Misses          3        3           
  Partials        2        2           

Flag	Coverage Δ
unittests	99.85% <100.00%> (ø)

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