fix: Removed reference Microsoft.Bcl.TimeProvider for .NET 8 or later (#19)

Author: samtrion

src/NetEvolve.Logging.XUnit/NetEvolve.Logging.XUnit.csproj

@@ -16,7 +16,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Bcl.TimeProvider" />
+    <PackageReference Include="Microsoft.Bcl.TimeProvider" Condition=" !$([MSBuild]::IsTargetFrameworkCompatible('$(TargetFramework)', 'net8.0')) " />
     <PackageReference Include="Microsoft.Extensions.Logging.Abstractions" />
     <PackageReference Include="Microsoft.Extensions.Logging.Configuration" />
     <PackageReference Include="NetEvolve.Arguments" />