Change helper withJson for ResponseFactory and optimice composer.json

[GoldraK]

A ResponseFactory has been created to add the Response withJson and removed the old one, now the responses with JSON are performed as follows:

return $response->withJson($message);

The composer.json has been changed so that it does not load the tests in production and lighten the load.

[maurobonfietti]

Thank you @GoldraK ! 😄