build(deps): Bump Microsoft.CodeAnalysis.Common and Microsoft.CodeAnalysis.Workspaces.Common

Bumps [Microsoft.CodeAnalysis.Common](https://github.com/dotnet/roslyn) and [Microsoft.CodeAnalysis.Workspaces.Common](https://github.com/dotnet/roslyn). These dependencies needed to be updated together.

Updates `Microsoft.CodeAnalysis.Common` from 4.11.0 to 4.12.0
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/main/docs/Breaking%20API%20Changes.md)
- [Commits](https://github.com/dotnet/roslyn/commits)

Updates `Microsoft.CodeAnalysis.Workspaces.Common` from 4.11.0 to 4.12.0
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/main/docs/Breaking%20API%20Changes.md)
- [Commits](https://github.com/dotnet/roslyn/commits)

---
updated-dependencies:
- dependency-name: Microsoft.CodeAnalysis.Common
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: Microsoft.CodeAnalysis.Workspaces.Common
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Directory.Packages.props

@@ -135,15 +135,15 @@
 	</ItemGroup>
 
 	<ItemGroup Label="Test Dependencies - Legacy" Condition="'$(TargetFramework)' == 'netcoreapp3.1' Or '$(TargetFramework)' == 'net5.0'">
-		<PackageVersion Update="xunit.runner.visualstudio" Version="2.4.5"/>
+		<PackageVersion Update="xunit.runner.visualstudio" Version="2.8.2"/>
 	</ItemGroup>
 
 	<ItemGroup Label="Source Code Generators">
 		<PackageVersion Include="System.Text.RegularExpressions" Version="4.3.1"/>
-		<PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.11.0"/>
-		<PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="4.11.0"/>
-		<PackageVersion Include="Microsoft.CodeAnalysis.Workspaces.Common" Version="4.11.0"/>
-		<PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.11.0"/>
+		<PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.12.0"/>
+		<PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="4.12.0"/>
+		<PackageVersion Include="Microsoft.CodeAnalysis.Workspaces.Common" Version="4.12.0"/>
+		<PackageVersion Include="Microsoft.CodeAnalysis.CSharp.Workspaces" Version="4.12.0"/>
 		<PackageVersion Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.2" />
 	</ItemGroup>
 </Project>