Update nuget packages used in test project

Author: Krusen

BencodeNET.Tests/BencodeNET.Tests.csproj

@@ -15,15 +15,14 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="AutoFixture" Version="4.8.0" />
-    <PackageReference Include="AutoFixture.AutoNSubstitute" Version="4.8.0" />
-    <PackageReference Include="AutoFixture.Xunit2" Version="4.8.0" />
-    <PackageReference Include="FluentAssertions" Version="5.6.0" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.9.0" />
-    <PackageReference Include="NSubstitute" Version="4.0.0" />
+    <PackageReference Include="AutoFixture" Version="4.11.0" />
+    <PackageReference Include="AutoFixture.AutoNSubstitute" Version="4.11.0" />
+    <PackageReference Include="AutoFixture.Xunit2" Version="4.11.0" />
+    <PackageReference Include="FluentAssertions" Version="5.9.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
+    <PackageReference Include="NSubstitute" Version="4.2.1" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
-    <DotNetCliToolReference Include="dotnet-xunit" Version="2.3.0-beta4-build3742" />
   </ItemGroup>
 
 </Project>