Fix PHPCS issues, fixes #196

[sprankhub]

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Issue

This PR fixes issue #196.

Proposed changes

...

[sprankhub]

@Schrank, @frostblogNet, @mautz-et-tong, could anyone please have a look?

[in-session]

Hi after update into the new merge on Magento 2.4.2 we get the follow error:

1 exception(s):
Exception #0 (Magento\Framework\Exception\LocalizedException): Ungültige Methode FireGento\MageSetup\Block\Product\Delivery\Interceptor:: helper

Exception #0 (Magento\Framework\Exception\LocalizedException): Ungültige Methode FireGento\MageSetup\Block\Product\Delivery\Interceptor:: helper
<pre>#1 FireGento\MageSetup\Block\Product\Delivery\Interceptor->__call() called at [vendor/firegento/magesetup2/view/frontend/templates/product/list/delivery.phtml:16]

magesetup2/view/frontend/templates/product/list/delivery.phtml:16:

//$_helper = $block->helper('Magento\Catalog\Helper\Output');
$_helper = $this->helper(Magento\Catalog\Helper\Output::class);