Improve the component-binding example

[Pacheco95]

I searched the repo for the example file to make a PR but found nothing.

Example: https://svelte.dev/examples/component-bindings

Keypad.svelte

<script>
import { createEventDispatcher } from 'svelte';

export let value = '';

const dispatch = createEventDispatcher();

const select = (num) => () => (value += num);
const clear = () => (value = '');
const submit = () => dispatch('submit');

{#each Array(9) as _, i} {i + 1} {/each} clear 0 submit

[geoffrich]

The code is in the svelte repo: https://github.com/sveltejs/svelte/blob/master/documentation/examples/05-bindings/12-component-bindings/Keypad.svelte

[Pacheco95]

Thanks @geoffrich Here's the PR https://github.com/sveltejs/svelte/pull/8931