Update test packages

Author: linkdotnet

tests/Directory.Build.props

@@ -3,8 +3,8 @@
 
   <ItemGroup Condition="$(MSBuildProjectName) != 'LinkDotNet.Blog.TestUtilities'">
     <PackageReference Include="bunit" Version="1.6.4" />
-    <PackageReference Include="FluentAssertions" Version="6.5.1" />
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0-preview-20220301-01" />
+    <PackageReference Include="FluentAssertions" Version="6.6.0" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0-preview-20220401-07" />
     <PackageReference Include="Moq" Version="4.17.2" />
     <PackageReference Include="xunit" Version="2.4.2-pre.12" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.3">