No more implicit base element

[fregante]

An implicit document base element is convenient but not a good idea, like jQuery.live demonstrated at the time.

Before

delegate('.btn', 'click', event => {
    console.log(event.delegateTarget);
});

After

delegate(document.body, '.btn', 'click', event => {
    console.log(event.delegateTarget);
});

or rather

delegate('.container-not-body', '.btn', 'click', event => {
    console.log(event.delegateTarget);
});

[fregante]

Done in 7c9b6c3

Will be published in the next major, this week.