composer.json Новое -- рабочий вариант

{
    "require": {
        "it-for-free/file-uploader": "dev-master",
        "melisa014/simple-mvc": "dev-master"
        
    },
    "minimum-stability" : "dev",
    "repositories": [
        {
           "type": "vcs",
           "url": "https://github.com/it-for-free/FileUploader"
        },
        {
           "type": "vcs",
           "url": "https://github.com/melisa014/SimpleMVC"
        },
        
        
        {
           "type": "vcs",
           "url": "https://github.com/it-for-free/PhpExamples"
        }
    ]
}

относится к этому