Option to hide skin tone button

[forresto]

I'm working with an emoji set (Noto Emoji) that doesn't have skin tone variations. I'd like to not have the skin tones button.

#198 was a similar issue, fixed for a previous version.

Workaround

Because the picker uses shadow DOM, we can inject a style sheet with overrides like this:

        const pickerEl = document.querySelector("em-emoji-picker");
        const pickerStyleEl = document.createElement("style");
        pickerStyleEl.innerHTML = ".skin-tone-button { display: none; }";
        pickerEl.shadowRoot.appendChild(pickerStyleEl);

Demo of emoji-mart with Noto Emoji.