Update all Microsoft test packages to latest versions

- Microsoft.NET.Test.Sdk: 17.12.0 → 18.0.1
- MSTest.TestAdapter: 3.6.3 → 4.0.2
- MSTest.TestFramework: 3.6.3 → 4.0.2
- coverlet.collector: 6.0.2 → 6.0.4

All packages updated to versions released on or after November 11, 2025,
ensuring full compatibility with .NET 10.

Author: claude

test/NosCore.Networking.Tests/NosCore.Networking.Tests.csproj

@@ -20,15 +20,15 @@
 
 	<ItemGroup>
 		<PackageReference Include="ApprovalTests" Version="7.0.0" />
-		<PackageReference Include="coverlet.collector" Version="6.0.2">
+		<PackageReference Include="coverlet.collector" Version="6.0.4">
 			<PrivateAssets>all</PrivateAssets>
 			<IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
 		</PackageReference>
 		<PackageReference Include="Microsoft.AspNet.WebApi.Client" Version="6.0.2" />
-		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.0.1" />
 		<PackageReference Include="Moq" Version="4.20.72" />
-		<PackageReference Include="MSTest.TestAdapter" Version="3.6.3" />
-		<PackageReference Include="MSTest.TestFramework" Version="3.6.3" />
+		<PackageReference Include="MSTest.TestAdapter" Version="4.0.2" />
+		<PackageReference Include="MSTest.TestFramework" Version="4.0.2" />
 		<PackageReference Include="NodaTime.Testing" Version="3.2.0" />
 	</ItemGroup>