Bump Microsoft.CodeAnalysis.CSharp from 4.1.0 to 4.2.0

Bumps [Microsoft.CodeAnalysis.CSharp](https://github.com/dotnet/roslyn) from 4.1.0 to 4.2.0.
- [Release notes](https://github.com/dotnet/roslyn/releases)
- [Changelog](https://github.com/dotnet/roslyn/blob/main/docs/Breaking%20API%20Changes.md)
- [Commits](dotnet/roslyn@v4.1.0...Visual-Studio-2019-Version-16.0-Preview-4.2)

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

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

Author: dependabot[bot]

XmlSchemaClassGenerator.Tests/XmlSchemaClassGenerator.Tests.csproj

@@ -24,7 +24,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
     </PackageReference>
     <PackageReference Include="Glob.cs" Version="5.1.766" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.1.0" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.2.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.2.0" />
     <PackageReference Include="System.CodeDom" Version="6.0.0" />
     <PackageReference Include="System.Text.Encoding.CodePages" Version="6.0.0" />