Merge pull request #1306 from exercism/dependabot/nuget/exercises/Microsoft.Reactive.Testing-4.1.6

Author: dependabot-preview[bot]

exercises/hangman/Hangman.csproj

@@ -10,7 +10,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.2.0" />
-    <PackageReference Include="Microsoft.Reactive.Testing" Version="4.1.5" />
+    <PackageReference Include="Microsoft.Reactive.Testing" Version="4.1.6" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />
   </ItemGroup>