feat(cache): add removeEvents method for bulk event deletion

[nogringo]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 87.50000% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 75.29%. Comparing base (3d4e3a5) to head (53acfb5).
⚠️ Report is 5 commits behind head on master.

Files with missing lines	Patch %	Lines
.../repositories/cache_manager/mem_cache_manager.dart	87.50%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #430      +/-   ##
==========================================
+ Coverage   75.15%   75.29%   +0.13%     
==========================================
  Files         144      144              
  Lines        5755     5763       +8     
==========================================
+ Hits         4325     4339      +14     
+ Misses       1430     1424       -6     

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