Reworked test to check for PHP version

`password_hash` is PHP 5.5. Instead of adding the sanity check in the code,
I've opted to put it in the test to ditch the overhead of having to make that
check for every request.

tests/ResourceTest.php

@@ -144,10 +144,19 @@ namespace
                 'regex'            => 'abc',
             ];
 
+            if (version_compare(PHP_VERSION, '5.5.0', '<'))
+            {
+                unset($_GET['bar']);
+            }
+
             new Pickles\Router();
 
             $this->assertEquals('bar', $_GET['foo']);
-            $this->assertFalse('unencrypted' == $_GET['bar']);
+
+            if (version_compare(PHP_VERSION, '5.5.0', '<'))
+            {
+                $this->assertFalse('unencrypted' == $_GET['bar']);
+            }
         }
 
         public function testHTTPS()