lupd

Implement `WeakSet` object

2

This Pull Request implements the `WeakSet` object. It changes the following: - Add `WeakSet` as a new `ObjectKind`. - Add casts to `WeakSet`. - Implement the `WeakSet` object (constructor, properties,...

Calling a method of the global object (using `this`/ `globalThis`) results in a `TypeError`. **To Reproduce** This JavaScript code reproduces the issue: ```javascript this.hasOwnProperty("length") ``` **Expected behavior** `true` is printed...