[andregoepel]

Summary

• Update bunit from 2.9.0 to 2.10.3.
• Update AngleSharp from 1.7.3 to 1.8.1.
• Update Microsoft.NET.Test.Sdk from 18.9.0 to 18.10.0.
• Regenerate locked restore files.

Verification

• dotnet build (0 warnings, 0 errors)
• dotnet test (42 passed)
• dotnet list package --vulnerable --include-transitive (none found)
• dotnet csharpier format .

A v1.3.2 patch release will follow after merge.

Closes #19