emoji as figure

[rjoydip-zz]

This PR is for find or get emoji and use it in the badge of custom configured type option. This could be the use case for #19. Emoji may be used instead of the logo.

Example

const { Signale, Badge } = require('signale');
// custom type option
const options = {
    types: {
        remind: {
            badge: Badge.get('coffee'),
            color: 'yellow',
            label: 'reminder'
        },
        santa: {
            badge: Badge.get('santa'),
            color: 'red',
            label: 'santa'
        }
    }
};