refactor: Bump OCMock to 3.9.4

[dplewis]

New Pull Request Checklist

• I am not disclosing a vulnerability.
• I am creating this PR in reference to an issue.

Issue Description

Fixes issue when running test on Xcode 16.1 RC / beta. Previously 3.9.2

xxx/NSObject+OCMAdditions.m:49:14: Incompatible function pointer types returning 'void (id _Nonnull, SEL _Nonnull, ...)' from a function with result type 'IMP' (aka 'id  _Nullable (*)(id _Nonnull, SEL _Nonnull, ...)')

https://github.com/erikdoe/ocmock/releases/tag/v3.9.4

[parse-github-assistant]

Thanks for opening this pull request!

• ❌ Please link an issue that describes the reason for this pull request, otherwise your pull request will be closed. Make sure to write it as Closes: #123 in the PR description, so I can recognize it.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.79%. Comparing base (dd05d41) to head (9ad3d33).
Report is 29 commits behind head on master.

Additional details and impacted files

@@             Coverage Diff             @@
##           master    #1822       +/-   ##
===========================================
+ Coverage   64.24%   82.79%   +18.55%     
===========================================
  Files         201      282       +81     
  Lines       23233    30726     +7493     
===========================================
+ Hits        14926    25441    +10515     
+ Misses       8307     5285     -3022     

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