Bump Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit

Bumps [Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit](https://github.com/dotnet/roslyn-sdk) from 1.1.1 to 1.1.2.
- [Release notes](https://github.com/dotnet/roslyn-sdk/releases)
- [Commits](https://github.com/dotnet/roslyn-sdk/commits)

---
updated-dependencies:
- dependency-name: Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

ProtobufSourceGenerator.Tests/ProtobufSourceGenerator.Tests.csproj

@@ -10,7 +10,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp.Analyzer.Testing.XUnit" Version="1.1.1" />
     <PackageReference Include="protobuf-net" Version="3.2.30" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.1" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp.SourceGenerators.Testing.XUnit" Version="1.1.2" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.10.0" />
     <PackageReference Include="xunit" Version="2.8.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.8.1" IncludeAssets="runtime; build; native; contentfiles; analyzers; buildtransitive" PrivateAssets="all" />