Merge pull request #54 from shinji-san/dependabot/nuget/develop/xunit.runner.visualstudio-2.8.1

build(deps): bump xunit.runner.visualstudio from 2.5.7 to 2.8.1

Resolves: #54

Author: shinji-san

tests/LuhnDotNetTest.csproj

@@ -10,7 +10,7 @@
     <ItemGroup>
         <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.9.0" />
         <PackageReference Include="xunit" Version="2.7.0" />
-        <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">
+        <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1">
             <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
             <PrivateAssets>all</PrivateAssets>
         </PackageReference>