Updated a dependencies in test project

Author: Taritsyn

test/JavaScriptEngineSwitcher.Tests/JavaScriptEngineSwitcher.Tests.csproj

@@ -14,9 +14,9 @@
 	<Import Project="../../build/common.props" />
 
 	<ItemGroup>
-		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.7.2" />
-		<PackageReference Include="xunit" Version="2.3.1" />
-		<PackageReference Include="xunit.runner.visualstudio" Version="2.3.1" />
+		<PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
+		<PackageReference Include="xunit" Version="2.4.1" />
+		<PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
 		<PackageReference Include="JavaScriptEngineSwitcher.ChakraCore.Native.win-arm" Version="3.0.0-rc1" />
 		<PackageReference Include="JavaScriptEngineSwitcher.ChakraCore.Native.win-x64" Version="3.0.0-rc1" />
 		<PackageReference Include="JavaScriptEngineSwitcher.ChakraCore.Native.win-x86" Version="3.0.0-rc1" />
@@ -61,8 +61,4 @@
 		<EmbeddedResource Include="Resources/cube.js;Resources/declinationOfDays.js;Resources/declinationOfHours.js;Resources/power.js" />
 	</ItemGroup>
 
-	<ItemGroup>
-		<DotNetCliToolReference Include="dotnet-xunit" Version="2.3.1" />
-	</ItemGroup>
-
 </Project>