change code to use `.addEventListener` instead?

When using addEventListener, one could pass an object `onclick=${{ handleEvent }}`.

This article explains it in more details what potential benefits this can have:
https://medium.com/@WebReflection/dom-handleevent-a-cross-platform-standard-since-year-2000-5bf17287fd38

I guess it would need only a single change here:
https://github.com/shama/bel/blob/68b261e6892170fb972f4488ab4dfc200b125213/browser.js#L76

`el[p] = val`
would become
`el.addEventListener(key.slice(2), val)`

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I can make the PR if this change would be desirable.
If there are reasons why this would not be desirable, I'd be curious to learn about the reasons too :-)