chore(deps-test): Bump Microsoft.NET.Test.Sdk from 17.12.0 to 18.6.0#8

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mainVanchestery/GsmCalculator:mainfrom

dependabot/nuget/GsmCalculator.Tests/Microsoft.NET.Test.Sdk-18.6.0Vanchestery/GsmCalculator:dependabot/nuget/GsmCalculator.Tests/Microsoft.NET.Test.Sdk-18.6.0Copy head branch name to clipboard