import { EventEmitter } from "https://deno.land/x/biscuit@0.2.4/mod.ts";
An event emitter (observer pattern)
Methods
emit(event: string, ...args: unknown[]): boolean
listenerCount(eventName: string): number
off(event: string, func: Function): this
on(event: string, func: Function): this
once(event: string, func: Function): this
rawListeners(eventName: string): Function[] | undefined