Feature Request: expose class decorator without define call about preact-custom-element

[developit]

This will work once #23 is merged:

@register
class Greeting {
    static tagName = 'gree-ting';
    static observedAttributes = ['name'];
    render({ name }) {
        return <span>Hello, {name}!</span>
    }
}

document.body.innerHTML = '<gree-ting name="gluck"></gree-ting>';