Wrong TS declaration of id at ColorPickerProps

Hey, I had some starting issues to setup the ts properly using your library.
In the end this was the last puzzle piece and I thing the type of the id inside ColorPickerProps shouldn't be null instead it should be a string?

```
export interface ColorPickerProps extends IroColorPickerOptions {
display?: string;
id?: null; <<<---- shouldn't this be a string?
layout?: ColorPickerLayoutDefinition[] | ColorPickerLayoutShorthand;
colors?: IroColorValue[];
transparency?: boolean;
margin: number;
}
```

Search the TypeScript declaration for the ColorPickerProps interface shown in the issue and inspect how its id property is used. Verify the declaration with the project's available type or build checks; done means id is optional and accepts string values rather than only null.

Written by the indexing model from the issue text.