Upgrade NUnit package to v3.13.2

Author: YevgeniyShunevych

test/Atata.Cli.HtmlValidate.IntegrationTests/Atata.Cli.HtmlValidate.IntegrationTests.csproj

@@ -8,7 +8,7 @@
     <PackageReference Include="Atata" Version="1.11.2" />
     <PackageReference Include="Atata.Cli.Npm" Version="1.1.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.10.0" />
-    <PackageReference Include="NUnit" Version="3.13.1" />
+    <PackageReference Include="NUnit" Version="3.13.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="3.17.0" />
   </ItemGroup>