Bump MSTest.TestFramework from 3.0.4 to 3.1.1 (#228)

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 3.0.4 to 3.1.1.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v3.0.4...v3.1.1)

---
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]

GeneratorTests/Moq.AutoMock.Generator.Example.MSTest/Moq.AutoMock.Generator.Example.MSTest.csproj

@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.0.4" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Include="coverlet.collector" Version="6.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>

Moq.AutoMock.Tests/Moq.AutoMock.Tests.csproj

@@ -30,7 +30,7 @@
     <PackageReference Include="Moq" version="4.18.4" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.0.4" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
     <ProjectReference Include="..\Moq.AutoMock\Moq.AutoMock.csproj" />
   </ItemGroup>
 </Project>

Moq.AutoMocker.TestGenerator.Tests/Moq.AutoMocker.TestGenerator.Tests.csproj

@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.3" />
     <PackageReference Include="MSTest.TestAdapter" Version="3.1.1" />
-    <PackageReference Include="MSTest.TestFramework" Version="3.0.4" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.1.1" />
     <PackageReference Include="Microsoft.CodeAnalysis" Version="4.6.0" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.MSTest" Version="1.1.1" />
   </ItemGroup>