Bump MSTest.TestFramework from 3.1.1 to 3.2.0 (#552)

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 3.1.1 to 3.2.0.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.1.1...v.3.2.0)

---
updated-dependencies:
- dependency-name: MSTest.TestFramework
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

AssemblyToProcess/AssemblyToProcess.csproj

@@ -8,7 +8,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.2.0" />
     <PackageReference Include="NUnit" Version="4.0.1" />
     <PackageReference Include="xunit" Version="2.6.4" />
   </ItemGroup>