Update NuGet packages.

Author: SvenGroot

src/Ookii.AnswerFile.Tests/Ookii.AnswerFile.Tests.csproj

@@ -76,8 +76,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.11.1" />
-    <PackageReference Include="MSTest.TestAdapter" Version="3.6.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.6.0" />
+    <PackageReference Include="MSTest.TestAdapter" Version="3.6.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.6.1" />
     <PackageReference Include="coverlet.collector" Version="6.0.2">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>