Bump MSTest.TestAdapter from 2.2.1 to 2.2.2 (#45)

Bumps [MSTest.TestAdapter](https://github.com/microsoft/testfx) from 2.2.1 to 2.2.2.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.2.1...v2.2.2)

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

src/Tests/RavenNet.Tests/RavenNet.Tests.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="2.2.1" />
   </ItemGroup>