Use `EventTarget` when targeting Node.js 20

[Richienb]

EventTarget is a built-in way to do events in Node.js 16+. This could be used instead of eventemitter3 when Node.js 14 is EOL.

[sindresorhus]

This can be done now.

[Richienb]

nevermind https://nodejs.org/api/events.html#class-customevent

[Richienb]

waiting for CustomEvent to go stable on node

[Richienb]

CustomEvent exposed in globals on v19 nodejs/node#44860
I think new globals is semver major so might not be backported...?

[Richienb]

Node.js 18 will be EOL April 2025. So, we should make this change by sometime early 2025.