Adding keyword 'record' 'init' 'nullable' (new syntax of C# 8, 9)

[kmycode]

New syntax keyword is added on c# 8, 9.
This pull request is adding keywords record, init and nullable.

nullable (C# 8)

https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-8

record, init (C# 9)

https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-9

example

#nullable enable

class TestClass
{
  public string Keyword { get; init; }
}

record TestModel(string Name, uint Id, int Age);

[github-actions]

JS File Size Changes (gzipped)

A total of 1 files have changed, with a combined diff of +14 B (+0.6%).

file	master	pull	size diff	% diff
components/prism-csharp.min.js	2.35 KB	2.37 KB	+14 B	+0.6%

Generated by 🚫 dangerJS against 8b76e8b

[RunDevelopment]

Thank you for the PR @kmycode!

I left you 2 comments.

Also, you have to rebuild Prism. Just run npm ci && npm run build and commit the changes.

Also also, please add tests for the new keywords (1, 2). Adding tests is relatively easy: Just modify the text (ignore the JSON for now) and run npm run test:languages -- --update. For more information, see this page.

[kmycode]

@RunDevelopment

Thank you for your review and works. I regret I didn't read development guides.
I see that the "record" keyword is difficult to implement.

I added some test codes. Please review again.

[RunDevelopment]

Great work! Thank you for contributing @kmycode!