chore: migrate away from Node's EventEmitter (#5979)

new-docs/puppeteer.eventemitter.emit.md

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+<!-- Do not edit this file. It is automatically generated by API Documenter. -->
+
+[Home](./index.md) &gt; [puppeteer](./puppeteer.md) &gt; [EventEmitter](./puppeteer.eventemitter.md) &gt; [emit](./puppeteer.eventemitter.emit.md)
+
+## EventEmitter.emit() method
+
+Emit an event and call any associated listeners.
+
+<b>Signature:</b>
+
+```typescript
+emit(event: EventType, eventData?: any): boolean;
+```
+
+## Parameters
+
+|  Parameter | Type | Description |
+|  --- | --- | --- |
+|  event | EventType | the event you'd like to emit |
+|  eventData | any | any data you'd like to emit with the event |
+
+<b>Returns:</b>
+
+boolean
+
+`true` if there are any listeners, `false` if there are not.
+