[Typescript] Add generic type for component

[temka1234]

Hi!
Thx for great library!

Is it possible to change component property type to generic (extends string)?
I need to restrict components by enum for avoiding mismatch.
At this moment i override all follow interfaces with prefix Typed;

Usage:

enum ComponentType { PANEL_1= 'panel1', PANEL_2 = 'panel2', ... };

const layoutModel: IJsonModel<ComponentType> = { ... };

Interfaces:

export interface ITabAttributes<T extends string = string> {
    ...
    component: T;
}

export interface IJsonTabNode<T extends string = string> extends ITabAttributes<T> {
    ...
}

interface IJsonBorderNode<T extends string = string> extends IBorderAttributes {
    ...
    children: IJsonTabNode<T>[];
}

interface IJsonTabSetNode<T extends string = string> extends ITabSetAttributes {
    ...
    children: IJsonTabNode<T>[];
}

interface IJsonRowNode<T extends string = string> extends IRowAttributes {
    ...
    children: (IJsonRowNode<T> | IJsonTabSetNode<T>)[];
}

interface IJsonModel<T extends string = string> {
    ...
    borders?: IJsonBorderNode<T>[];
    layout: IJsonRowNode<T>;
}