Bump MSTest.TestFramework from 2.0.0 to 2.1.0

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 2.0.0 to 2.1.0.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Commits](microsoft/testfx@v2.0.0...v2.1.0)

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

Author: dependabot-preview[bot]

tests/CacheTower.Tests/CacheTower.Tests.csproj

@@ -9,7 +9,7 @@
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="16.5.0" />
     <PackageReference Include="Moq" Version="4.13.1" />
     <PackageReference Include="MSTest.TestAdapter" Version="2.1.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="2.0.0" />
+    <PackageReference Include="MSTest.TestFramework" Version="2.1.0" />
   </ItemGroup>
 
   <ItemGroup>