update test file

tests/002.phpt

@@ -13,7 +13,7 @@ object(Vtiful\Kernel\Excel)#1 (3) {
   ["config":"Vtiful\Kernel\Excel":private]=>
   array(1) {
     ["path"]=>
-    string(8) "./tests"
+    string(7) "./tests"
   }
   ["fileName":"Vtiful\Kernel\Excel":private]=>
   NULL