deps: Update MSTest

UnitTest/UnitTest.csproj

@@ -10,8 +10,8 @@
     <PackageReference Include="Dns.Net" Version="0.1.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.0.0" />
     <PackageReference Include="Moq" Version="4.16.1" />
-    <PackageReference Include="MSTest.TestAdapter" Version="2.2.7" />
-    <PackageReference Include="MSTest.TestFramework" Version="2.2.7" />
+    <PackageReference Include="MSTest.TestAdapter" Version="2.2.8" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.2.8" />
     <PackageReference Include="coverlet.collector" Version="3.1.0" PrivateAssets="all" /> 
   </ItemGroup>