JSX literal attribute expressions are not getting preserved

[thescientist13]

What happened?

Trying to use a literal attribute in a JSX expression and it looks like there are getting stripped out?

export default class BadgeComponent extends HTMLElement {
  connectedCallback() {
    this.render();
  }

  render() {
    return (
        <img width={10} />
    );
  }
}

customElements.define('wcc-badge', BadgeComponent);

Steps to reproduce

1. Create a template with a literal attribute expression
2. Run it through WCC

Environment

latest WCC version

Additional Context

Originally observed in #110