Bump xunit versions

Author: josephdecock

test/Tests/Tests.csproj

@@ -17,8 +17,8 @@
         <PackageReference Include="Duende.IdentityServer" Version="$(IdentityServerVersion)" />
 
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
-        <PackageReference Include="xunit" Version="2.8.1" />
-        <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">
+        <PackageReference Include="xunit" Version="2.9.0" />
+        <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>