Make error parameter of stream.abort optional

[mkermani144]

js-libp2p/packages/interface/src/connection/index.ts

Lines 128 to 131 in abc7e66

	*
	* The sink will return and the source will throw if an error is passed or return normally if not.
	*/
	abort(err: Error): void

It's stated that source will throw if error is passed, and will return otherwise. But the parameter is not optional, and it's not possible not to pass an error to abort.

[achingbrain]

That's a mistake in the docs. If you want to close a connection gracefully (e.g. wait for all data to be sent), call conn.close(), if you want to close immediately, call conn.abort(err) and pass the reason.

In the future that error will get turned into an error code and sent to the remote peer so they know what went wrong.

[mkermani144]

Cool, maybe we can fix the doc in the future.