Bump MSTest.TestFramework from 3.2.2 to 3.3.1 (#305)

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 3.2.2 to 3.3.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.2.2...v3.3.1)

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

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

Author: dependabot[bot]

Directory.Packages.props

@@ -12,7 +12,7 @@
     <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
     <PackageVersion Include="Moq" Version="4.20.70" />
     <PackageVersion Include="MSTest.TestAdapter" Version="3.2.2" />
-    <PackageVersion Include="MSTest.TestFramework" Version="3.2.2" />
+    <PackageVersion Include="MSTest.TestFramework" Version="3.3.1" />
     <PackageVersion Include="NonBlocking" Version="2.1.2" />
     <PackageVersion Include="NUnit" Version="4.1.0" />
     <PackageVersion Include="NUnit3TestAdapter" Version="4.5.0" />