Upgrade mongo-driver to v2

[sunboyy]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 62.50000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 90.56%. Comparing base (b55aa4c) to head (f2d6f9e).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
main.go	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #54      +/-   ##
==========================================
- Coverage   90.68%   90.56%   -0.12%     
==========================================
  Files          23       23              
  Lines        1588     1589       +1     
==========================================
- Hits         1440     1439       -1     
- Misses        129      131       +2     
  Partials       19       19              

Flag	Coverage Δ
unittests	90.56% <62.50%> (-0.12%)	⬇️

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