fix for :when using apply_gti_filter it was removing all event

[kashish2210]

fix for: #68

now working :)

[codecov-commenter]

Codecov Report

❌ Patch coverage is 29.72973% with 52 lines in your changes missing coverage. Please review.
✅ Project coverage is 85.06%. Comparing base (98935ce) to head (00a610a).
⚠️ Report is 8 commits behind head on main.

Files with missing lines	Patch %	Lines
src/events.jl	29.72%	52 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #69      +/-   ##
==========================================
- Coverage   89.26%   85.06%   -4.21%     
==========================================
  Files           5        5              
  Lines        1025     1125     +100     
==========================================
+ Hits          915      957      +42     
- Misses        110      168      +58     

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