fix deprecated usage of assertEquals

should be assertEqual, as the other form has been deprecated since 2010 and since been removed

python/test_gilded_rose.py

@@ -9,7 +9,7 @@ def test_foo(self):
         items = [Item("foo", 0, 0)]
         gilded_rose = GildedRose(items)
         gilded_rose.update_quality()
-        self.assertEquals("fixme", items[0].name)
+        self.assertEqual("fixme", items[0].name)
 
 
 if __name__ == '__main__':