Feature Request: Allow assertions on jQuery custom data

[dominicbarnes]

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Howdy there, would be nice if I could have assertions on jQuery custom data attached to elements. For example

<div id="test" data-foo="bar"></div>

$expect("#test").to.have.data();
$expect("#test").to.have.data("foo");
$expect("#test").to.have.data("foo", "bar");

I imagine it's API would behave a lot like .attr(). Any thoughts?