Bug fix of passing array parameter to signal link

[aleswita]

• Bug fix of passing array parameter to signal link (can't make dependent select on multiple select box)

$form->addMultiSelect('foo1', 'foo1')
	->setItems([0, 1, 2, 3, 4, 5]);

$form->addDependentMultiSelectBox('foo2', 'foo2', $form['foo1'])
	->setDependentCallback(function (array $values): \NasExt\Forms\Controls\DependentSelectBoxData {
		$data = new \NasExt\Forms\Controls\DependentSelectBoxData;
		return $data;
	});

• tests improvments
• change new lines from Windows (CR LF) to Unix (LF)

[coveralls]

Coverage remained the same at 98.077% when pulling 6ef7033 on aleswita:master into 17dced8 on NasExt:master.

[aleswita]

@duskohu pls check changes in client side java script