Bump Microsoft.NET.Test.Sdk from 16.3.0 to 16.4.0

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 16.3.0 to 16.4.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](microsoft/vstest@v16.3...v16.4.0)

Signed-off-by: dependabot-preview[bot] <[email protected]>

Author: dependabot-preview[bot]

src/common.props

@@ -12,7 +12,7 @@
   <PropertyGroup>
     <XunitVersion>2.4.1</XunitVersion>
     <XunitCliVersion>2.3.1</XunitCliVersion>
-    <TestSdkVersion>16.3.0</TestSdkVersion>
+    <TestSdkVersion>16.4.0</TestSdkVersion>
   </PropertyGroup>
   <PropertyGroup Condition=" '$(TargetFramework)' == 'netcoreapp2.1' ">
     <DefineConstants>$(DefineConstants);NETCORE</DefineConstants>