fix: require the date field in LogObj to be of type Date

[kricsleo]

resolves #351

In reference to #372

[codecov]

Codecov Report

Attention: Patch coverage is 33.33333% with 2 lines in your changes missing coverage. Please review.

Project coverage is 29.27%. Comparing base (24c98ce) to head (c9c65a5).
Report is 57 commits behind head on main.

Files with missing lines	Patch %	Lines
src/utils/log.ts	33.33%	2 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##             main     #379       +/-   ##
===========================================
- Coverage   61.08%   29.27%   -31.82%     
===========================================
  Files          13       43       +30     
  Lines        1380     1725      +345     
  Branches       58       88       +30     
===========================================
- Hits          843      505      -338     
- Misses        537     1193      +656     
- Partials        0       27       +27     

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