Make these tests compatible with PHPUnit 4.8

Author: sebastianbergmann

tests/Framework/AssertTest.php

@@ -184,8 +184,8 @@ public function testAssertArraySubset()
 
         $arrayAccessData = new ArrayObject($array);
 
-        $this->assertArraySubset(['a' => 'item a', 'c' => ['a2' => 'item a2']], $arrayAccessData);
-        $this->assertArraySubset(['a' => 'item a', 'd' => ['a2' => ['b3' => 'item b3']]], $arrayAccessData);
+        $this->assertArraySubset(array('a' => 'item a', 'c' => array('a2' => 'item a2')), $arrayAccessData);
+        $this->assertArraySubset(array('a' => 'item a', 'd' => array('a2' => array('b3' => 'item b3'))), $arrayAccessData);
 
         try {
             $this->assertArraySubset(array('a' => 'bad value'), $array);