Add user.tap() method

[calebeby]

Puppeteer has a .tap() method, which fires slightly different events from .click. We could add this method to our user API.

TODO: figure out the benefits of having this method (specifically which events does it fire differently, and when does it matter), and decide if it makes sense to add this.

It is also worth considering whether adding an option to .click, like user.click(el, { type: 'tap' }) is better

[calebeby]

I think I'm gonna put this off until we have test code on a real project that needs .tap where the behavior of .click is different enough to actually matter