Add an option to always expose the interval param for the device code grant

[erickskrauch]

The title. I want to always expose the interval param. Clients aren't always responsible for reading the standard to know that the poll interval defaults to 5 seconds. Microsoft and Google always return this parameter.

My suggestion is simply to remove the next condition:

oauth2-server/src/ResponseTypes/DeviceCodeResponse.php

Lines 48 to 50 in 7b9ec37

	if ($this->deviceCodeEntity->getInterval() !== self::DEFAULT_INTERVAL) {
	$responseParams['interval'] = $this->deviceCodeEntity->getInterval();
	}

[hafezdivandari]

You may refer to #1410