Sending `{}` as payload not possible

[JensSpanier]

Because of this check

node-apn/lib/client.js

Lines 576 to 578 in 4912793

	if (notification.body !== '{}') {
	request.write(notification.body);
	}

it is not possible to send {} as payload. But Apple requires this for sending updates for wallets:

Create and send a push notification for each registered device. The notification uses the same certificate and private key that the creator of the pass used to sign the original, the push token registered by the device, and an empty JSON dictionary for the payload.

https://developer.apple.com/documentation/walletpasses/adding-a-web-service-to-update-passes#Send-a-Push-Notification

Is it possible to change this check?

[parse-github-assistant]

🚀 Thanks for opening this issue!