Feature: Chat method timeouts

[marcandrews]

Sorry @victorperin, but I had to remove all timeout functionality because if the message is queued, it may cause the timeout for the confirmation event to expire even though the message has yet to be sent.

I did however replace the resolveOnEvent with p-event that supports timeouts. I am thinking about adding and optional options?: { timeout?: number } parameter to all Chat methods that send messages, such as Chat#join and Chat#say, so you can pass a timeout to p-event and timeout methods if needed.

Let me know what you think.