Bump Microsoft.NET.Test.Sdk

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.10.0-release-20210330-02 to 16.10.0-release-20210422-02.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](microsoft/vstest@v16.10.0-release-20210330-02...v16.10.0-release-20210422-02)

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

BackendTests/BackendTests.csproj

@@ -7,7 +7,7 @@
     </PropertyGroup>
 
     <ItemGroup>
-        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0-release-20210330-02" />
+        <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0-release-20210422-02" />
         <PackageReference Include="Moq" Version="4.16.1" />
         <PackageReference Include="Shouldly" Version="4.0.3" />
         <PackageReference Include="xunit" Version="2.4.1" />