[RESOLVIDO] composer com erro

Olá pessoal,

alguém já enfrentou esse erro no composer?

composer.json:

{
"repositories": [
{
"type": "git",
"url": "https://github.com/gabrieldarezzo/colorizzar"
}
],
"require": {
"gabrieldarezzo/colorizzar": "dev-master"
}
}

Executo o composer update e....

[UnexpectedValueException]
Error while installing gabrieldarezzo/colorizzar, composer-plugin packages should have a class defined in their extra key to be usable.

------

E ao mesmo tempo se eu tento uma abordagem como:

composer require gabrieldarezzo/colorizzar:"*"

Me retorna esse erro:

Problem 1

• The requested package gabrieldarezzo/colorizzar * is satisfiable by gabrieldarezzo/colorizzar[dev-master] but these conflict with your requirements or minimum-stability.

Basicamente quero puxar um package do packagist.

https://packagist.org/packages/gabrieldarezzo/colorizzar

composer.json atual do projeto:

{
"name": "gabrieldarezzo/colorizzar",
"description": "Change the colors of an image from RGB you want",
"license": "MIT",
"type": "composer-plugin",
"keywords": ["image", "gd", "rgb", "color", "alpha"],
"homepage": "https://github.com/gabrieldarezzo/colorizzar",
"authors": [
{
"name": "Gabriel Darezzo",
"email": "darezzo.gabriel@gmai.com",
"homepage": "https://inwork.com.br"
}
],
"minimum-stability": "dev",
"require": {
"php": ">=5.3.0"
},
"require-dev": {
"phpunit/phpunit": "5.5.7"
},
"autoload": {
"psr-0": {
"Colorizzar": "src/"
}
}
}

Url direta do github:

https://github.com/gabrieldarezzo/colorizzar

Qualquer luz será bem vinda haha.