feat: Support csharp 13

[renovate]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
Microsoft.CodeAnalysis.CSharp	4.11.0 -> 4.12.0
Microsoft.CodeAnalysis.CSharp.Workspaces	4.11.0 -> 4.12.0
Microsoft.CodeAnalysis.Common	4.11.0 -> 4.12.0
Microsoft.CodeAnalysis.VisualBasic	4.11.0 -> 4.12.0

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[renovate]

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[rouke-broersma]

Failing because:

Mutation Block removal mutation in file CSharp12.cs does not have one of the known parent syntax kinds as it's parent. 
Instead it has: 
ClassDeclaration,
FileScopedNamespaceDeclaration,
CompilationUnit

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud