Allow using nette/utils ^4.0

[hubipe]

This library require nette/utils ^3.0, which effectively prevent updating Nette on our project to 4.0.
I've created pull request, which only modifies composer.json to allow nette/utils ^4.0 as this library does not use any of the methods listed in BC breaks on nette/utils 4.0.

Please once you merge it, release a new version. Thank you

[thorewi]

@hubipe except of chaning to 4.0 i can see also:

public function stopConsuming(): void
	{
		foreach ($this->queues as $name => $options) {
			$this->getChannel()->basic_cancel($this->getQueueConsumerTag($name));
		}
		$this->onStop($this);
	}

which probably shouldn't be there?