add label to ButtonProps type definition

[havijs]

The field label seems to be missing from ButtonProps type definition.

const editor = grapesjs.init({
  panels: {
    defaults: [
      {
        id: 'panel-switcher',
        el: '.panel__switcher',
        buttons: [{
            id: 'show-layers',
            active: true,
            label: 'Layers', // Object literal may only specify known properties, and 'label' does not exist in type 'ButtonProps'. 
            command: 'show-layers',
            togglable: false,
          }]
    }
}

[artf]

Thanks @havijs