Add laravel auto-discovery for version 5.5

[jagDanJu]

Hey,

Laravel 5.5 introduce a nice new way to add Facades and Service Provider. You should add following to the composer.json section:

"extra": {
        "laravel": {
            "providers": [
                "ZanySoft\\Zip\\ZipServiceProvider"
            ],
            "aliases": {
                "Zip": "ZanySoft\\Zip\\ZipFacade"
            }
        }
    },

Then Laravel will automatically register this service providers and facades when it is installed.

https://laravel.com/docs/5.5/packages#package-discovery