[FIX] Fix normalizer error

[DocentBF]

Got an error
Symfony\Component\Serializer\Exception\LogicException [ 0 ]: Cannot normalize attribute "phones" because the injected serializer is not a normalizer. ~ /vendor/symfony/serializer/Normalizer/AbstractObjectNormalizer.php [ 209 ]
when use \LaravelDoctrine\ORM\Serializers\Arrayable::toArray() method on entity with json-typed property:

class Region 
{
    /**
     * @ORM\Column(name="phones", type="json")
     */
    protected $phones = [];
}

Changes proposed in this pull request:

ArraySerializer: non-direct normalizer call.

[DocentBF]

Sorry, I forgot the Serializer import. Fixed.

[eigan]

Thank you @DocentBF. Could you provide a failing testcase? You could add it to ArraySerializerTest

[DocentBF]

@eigan done.

[eigan]

Looks good! 👍🏻 Thanks!