Add event union type to trigger method

[nandi95]

This will give us nice, typehints of the possible values.

The dom-event-type already includes the keys that can be triggered.
would as const and keyof work to extract the keys from that package?

Are some of it needs to be filtered out?

[cexbrayat]

That sounds like a nice idea, go ahead with a PR 👍

[nandi95]

Linked issue

[lmiller1990]

We can probably inline the entire dom-event-types lib? No real point having a static list of events as a dependency, and then we can improve the types and the such. What do you think?

[nandi95]

That would work as a quick fix for sure. My preference that it's a dependency that others can pull in too. However that library doesn't seem to be active anymore so I'm not sure.

[lmiller1990]

That lib is actually by one of the original maintainers of Test Utils and has moved on from the front-end world - I don't expect it will see an update or release.