Bump Microsoft.NET.Test.Sdk from 15.3.0 to 16.4.0

Bumps [Microsoft.NET.Test.Sdk](https://github.com/microsoft/vstest) from 15.3.0 to 16.4.0.
- [Release notes](https://github.com/microsoft/vstest/releases)
- [Commits](microsoft/vstest@v15.3.0...v16.4.0)

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

src/common.props

@@ -20,6 +20,6 @@
   </PropertyGroup>
   <PropertyGroup>
     <XunitVersion>2.3.0</XunitVersion>
-    <TestSdkVersion>15.3.0</TestSdkVersion>
+    <TestSdkVersion>16.4.0</TestSdkVersion>
   </PropertyGroup>
 </Project>