Bump MSTest.TestAdapter from 2.2.1 to 2.2.2 (#211)

Author: dependabot[bot]

Tests/RavenNest.UnitTests/RavenNest.UnitTests.csproj

@@ -8,7 +8,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.9.1" />
-    <PackageReference Include="MSTest.TestAdapter" Version="2.2.1" />
+    <PackageReference Include="MSTest.TestAdapter" Version="2.2.2" />
     <PackageReference Include="MSTest.TestFramework" Version="2.2.2" />
   </ItemGroup>