Support TypeScript 4.2 abstract constructor signatures

[sosukesuzuki]

Q	A
Fixed Issues?	N/A
Minor: New Feature?	Y
Tests Added + Pass?	Yes
License	MIT

https://devblogs.microsoft.com/typescript/announcing-typescript-4-2-beta/#abstract-construct-signatures

let Ctor: abstract new () => HasArea = Shape;

Extends TSConstructorType to add an abstract property

[babel-bot]

Build successful! You can test your changes in the REPL here: https://babeljs.io/repl/build/41535/

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[nicolo-ribaudo]

Do you know it @typescript-eslint/parser will follow the same AST?

[sosukesuzuki]

Do you know it @typescript-eslint/parser will follow the same AST?

No, I'll ask the maintainer of typescript-eslint

[sosukesuzuki]

The new AST is fine with TSConstructorType and abstract: boolean property for typescript-eslint too (typescript-eslint/typescript-eslint#2935 (comment)).