Fixed issue when tests runs under windows

Author: fergthh

tests/ManagerTest.php

@@ -33,6 +33,14 @@ public function testFilesMethod()
 //            ],
         ];
 
+        if(stristr(PHP_OS, 'win') !== false){
+            foreach ($expected as $keys => $value) {
+                foreach($expected[$keys] as $key => $content){
+                    $expected[$keys][$key] = str_replace('/', '\\', $content);
+                }
+            }
+        }
+
         $this->assertEquals($expected, $manager->files());
     }