Bump Microsoft.NET.Test.Sdk from 17.6.2 to 18.3.0#6

Jean-Fischer merged 1 commit intomainJean-Fischer/sharpen.analyzer:mainfrom

dependabot/nuget/Sharpen.Analyzer/Sharpen.Analyzer/Sharpen.Analyzer.Tests/main/Microsoft.NET.Test.Sdk-18.3.0Jean-Fischer/sharpen.analyzer:dependabot/nuget/Sharpen.Analyzer/Sharpen.Analyzer/Sharpen.Analyzer.Tests/main/Microsoft.NET.Test.Sdk-18.3.0Copy head branch name to clipboard