Bump Microsoft.CodeAnalysis.CSharp from 4.6.0 to 4.7.0 in /Source

Bumps [Microsoft.CodeAnalysis.CSharp](https://github.com/dotnet/roslyn) from 4.6.0 to 4.7.0.
- [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.CSharp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Source/Csla.Generators/cs/Csla.Generators.CSharp/Csla.Generators.CSharp.csproj

@@ -19,7 +19,7 @@
 
    <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.Common" Version="4.7.0" PrivateAssets="all" />
-    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.6.0" PrivateAssets="all" />
+    <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.7.0" PrivateAssets="all" />
   </ItemGroup>
 
   <ItemGroup>