Merge pull request #3442 from gui-cs/dependabot/nuget/xunit-2.8.0

Bump xunit from 2.7.1 to 2.8.0

UnitTests/UnitTests.csproj

@@ -21,7 +21,7 @@
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     <PackageReference Include="ReportGenerator" Version="5.2.5" />
     <PackageReference Include="System.Collections" Version="4.3.0" />
-    <PackageReference Include="xunit" Version="2.7.1" />
+    <PackageReference Include="xunit" Version="2.8.0" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>