Merge pull request #19 from stof/clean_phpunit

Clean leftover code from older PHPUnit versions

Author: stof

tests/CacheWarmer/HashCacheWarmerTest.php

@@ -48,11 +48,7 @@ public function testWarmUp()
 
         $values = $fallbackPool->getValues();
 
-        if (method_exists($this, 'assertIsArray')) {
-            $this->assertIsArray($values);
-        } else {
-            $this->assertInternalType('array', $values);
-        }
+        $this->assertIsArray($values);
         $this->assertCount(2, $values);
         $this->assertArrayHasKey(base64_encode('foo'), $values);
         $this->assertArrayHasKey(base64_encode('bar/baz.js'), $values);