Upgrade NuGet dependencies

[axunonb]

Upgraded AngleSharp, MailKit, MimeKit, Microsoft.SourceLink.GitHub, and System.Configuration.ConfigurationManager to their latest versions

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 91.92%. Comparing base (f2a8640) to head (18b68c0).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #63   +/-   ##
=======================================
  Coverage   91.92%   91.92%           
=======================================
  Files          39       39           
  Lines        2019     2019           
=======================================
  Hits         1856     1856           
  Misses        163      163           

Flag	Coverage Δ
net10.0-linux	93.80% <ø> (ø)
net10.0-windows	91.87% <ø> (ø)

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