N°3091 Update PHPUnit to 8.5 : fix setUp and teardDown methods signatures

"Return type declaration must be compatible with parent"
See https://phpunit.de/announcements/phpunit-8.html "Return Type of Template Methods"

test/application/UtilsTest.php

@@ -24,12 +24,6 @@
  */
 class UtilsTest extends \Combodo\iTop\Test\UnitTest\ItopTestCase
 {
-	public function setUp()
-	{
-		parent::setUp();
-		require_once(APPROOT.'application/utils.inc.php');
-	}
-
 	public function testEndsWith()
 	{
 		$this->assertFalse(utils::EndsWith('a', 'bbbb'));