Update Directory.Build.targets

Author: Youssef1313

Directory.Build.targets

@@ -61,6 +61,7 @@
           <FromP2P>true</FromP2P>
         </ProjectReference>
 
+        <PackageReference Include="MSTest.TestFramework" Version="$(MSTestTestFrameworkVersion)" />
         <PackageReference Include="Moq" Version="$(MoqVersion)" />
         <PackageReference Include="Microsoft.CodeCoverage" Version="$(MicrosoftCodeCoverageVersion)" />
         <!--