thumbnail prop is documented but missing from TypeScript props interface

[webimedia]

Issue Description

The README.md documents a thumbnail prop:

thumbnail (String): URL-encoded value of the poster/thumbnail URL to display. Defaults to the value set in asset details.

However, in src/index.tsx, the props interface (or type definition) for the GumletPlayer component does not include thumbnail. This causes TypeScript errors when trying to use it, and lacks autocomplete/intellisense support.

Expected Behavior

The thumbnail prop should be added to the component's PropTypes/TypeScript interface, e.g.:

interface GumletPlayerProps {
  // ... existing props
  thumbnail?: string;
}

Steps to Reproduce

1. Install the package.
2. In a TypeScript React file, use
3. The player ignore the thumbnail attribute

Additional Info

• Package version: @gumlet/react-embed-player@2.0.19