Bump MSTest.TestFramework from 2.2.4 to 3.8.3

Bumps [MSTest.TestFramework](https://github.com/microsoft/testfx) from 2.2.4 to 3.8.3.
- [Release notes](https://github.com/microsoft/testfx/releases)
- [Changelog](https://github.com/microsoft/testfx/blob/main/docs/Changelog.md)
- [Commits](microsoft/testfx@v2.2.4...v3.8.3)

---
updated-dependencies:
- dependency-name: MSTest.TestFramework
  dependency-version: 3.8.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

MyNumberNET_Test/MyNumberNET_Test.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <TargetFramework>netcoreapp3.1</TargetFramework>
     <IsPackable>false</IsPackable>
@@ -19,7 +19,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.5.0" />
     <PackageReference Include="MSTest.TestAdapter" Version="2.2.4" />
-    <PackageReference Include="MSTest.TestFramework" Version="2.2.4" />
+    <PackageReference Include="MSTest.TestFramework" Version="3.8.3" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\MyNumberNET\MyNumberNET.csproj" />