Bump MartinCostello.Logging.XUnit.v3 from 0.5.1 to 0.6.0 (#217)

Author: dependabot[bot]

tests/Directory.Build.props

@@ -13,7 +13,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="MartinCostello.Logging.XUnit.v3" Version="0.5.1" />
+    <PackageReference Include="MartinCostello.Logging.XUnit.v3" Version="0.6.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.14.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="3.1.4" />
     <PackageReference Include="xunit.v3" Version="3.0.1" />