✨ New features and improvements

• Target .NET 6 (#31) @jetersen

📦 Dependency updates

• Bump Specshell.WinForm.HiddenForm from 1.0.0 to 2.0.0 (#32) @dependabot
• Bump Microsoft.NET.Test.Sdk from 16.8.3 to 17.0.0 (#26) @dependabot
• Bump NUnit from 3.13.1 to 3.13.2 (#22) @dependabot
• Bump System.Text.Encoding.CodePages from 5.0.0 to 6.0.0 (#27) @dependabot
• Bump NUnit3TestAdapter from 3.17.0 to 4.1.0 (#28) @dependabot
• Bump Microsoft.SourceLink.GitHub from 1.0.0 to 1.1.1 (#30) @dependabot