Make Yarak::call accept DI interface instead of concrete class.

README.md

@@ -640,7 +640,7 @@ php yarak migrate --refresh
 ### Calling Yarak In Code
 To call a Yarak command from your codebase, use the Yarak::call static method.
 ```php
-public static function call($command, array $arguments = [], FactoryDefault $di = [])
+public static function call($command, array $arguments = [], \Phalcon\DiInterface $di = [])
 ```
 For example, to call `migrate --rollback --steps=2`:
 ```php
@@ -654,8 +654,11 @@ Yarak::call('migrate', [
 
 Yarak will attempt to resolve its config from /app/config/service.php. If your services file is in a different location, you will need to pass an instance of $di manually.
 ```php
+use Phalcon\DI;
 use Yarak\Yarak;
 
+$di = DI::getDefault();
+
 Yarak::call('migrate', [
     '--rollback' => true,
     '--steps'    => 2,

src/Yarak.php

@@ -2,6 +2,7 @@
 
 namespace Yarak;
 
+use Phalcon\DiInterface;
 use Phalcon\Di\FactoryDefault;
 use Yarak\Exceptions\FileNotFound;
 use Symfony\Component\Console\Input\ArrayInput;
@@ -16,7 +17,7 @@ class Yarak
      * @param array          $arguments Argument array.
      * @param FactoryDefault $di        DI, may be necessary for php 5.6.
      */
-    public static function call($command, array $arguments = [], FactoryDefault $di = null)
+    public static function call($command, array $arguments = [], DiInterface $di = null)
     {
         $kernel = self::getKernel($di);