Improve return type of Object.create

[Eyal-Shalev]

Currently it is typed like so:

interface ObjectConstructor {
    /**
     * Creates an object that has the specified prototype or that has null prototype.
     * @param o Object to use as a prototype. May be null.
     */
    create(o: object | null): any;

    /**
     * Creates an object that has the specified prototype, and that optionally contains specified properties.
     * @param o Object to use as a prototype. May be null
     * @param properties JavaScript object that contains one or more property descriptors.
     */
    create(o: object | null, properties: PropertyDescriptorMap & ThisType<any>): any;
}

So even though we are creating an object from a prototype and can deduce the type of the created object, it is set as any.