fix: rename event emitter class

[achingbrain]

We add types to a EventEmitter class which extends the plain js EventTarget.

The name is chosen to give familiarity to node developers but it's not generally a good idea.

This refactor:

1. Exports a new TypedEventTarget interface which adds types to EventTarget
2. Renames EventEmitter to TypedEventEmitter to draw a distinction between them
3. Re-exports TypedEventEmitter as EventEmitter to preserve backwards compatibility

In the future all consuming code should rely on the TypedEventTarget interface while implementing code uses TypedEventEmitter as an implementation of a TypedEventEmitter.

By depending on the interface and not the implementation consuming code is isolated from problems that arise when two versions of @libp2p/interface is in the dependency tree and the event subsystems would otherwise be compatible due to type overlap.

This manifests as an error message about incompatible implementations of the private #listeners field in EventEmitter.

Backwards compatibility is achieved by exporting the TypedEventEmitter class as the older EventEmitter name. This should be removed in a future PR to the v1.0 branch once external modules (e.g. Gossipsub) have been updated to use the new TypedEventEmitter symbol.

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation if necessary (this includes comments as well)
• I have added tests that prove my fix is effective or that my feature works

[MysticalDragon98]

Hi, this is firing an error in my implementation:

import { TypedEventEmitter, CustomEvent } from '@libp2p/interface/events';
         ^^^^^^^^^^^^^^^^^
SyntaxError: The requested module '@libp2p/interface/events' does not provide an export named 'TypedEventEmitter'

And checking in the 0.1.3 version, there is no TypedEventEmitter published in the npm registry version. Maybe you updated the libp2p but not the interface in the npm registry?

[achingbrain]

The original version of this PR went out with the refactor: tag which release-please didn't translate into modules needing a release so @libp2p/interface had the TypedEventEmitter class added but it was not released.

Hold tight, a new version should be out shortly that fixes the issue.

[achingbrain]

@MysticalDragon98 this should be fixed now, sorry for the disruption. Please delete any lockfiles & reinstall deps.