Bump Microsoft.NET.Test.Sdk from 18.3.0 to 18.4.0

---
updated-dependencies:
- dependency-name: Microsoft.NET.Test.Sdk
  dependency-version: 18.4.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

tests/PolylineAlgorithm.Tests/PolylineAlgorithm.Tests.csproj

@@ -16,7 +16,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.3.0" />
+		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.4.0" />
 		<PackageReference Include="Microsoft.Testing.Extensions.VSTestBridge" Version="2.1.0" />
 		<PackageReference Include="MSTest" Version="4.1.0" />
 		<PackageReference Include="Microsoft.Testing.Platform.MSBuild" Version="2.1.0" />